diff --git a/tools/building.py b/tools/building.py
index 6581369a44048c7da675f083baa66c83814478d6..4da64f6fcfc569fa5eed21120049422e982fb4de 100644
--- a/tools/building.py
+++ b/tools/building.py
@@ -187,7 +187,7 @@ def PrepareBuilding(env, root_directory, has_libcpu=False, remove_components = [
     AddOption('--target',
                       dest = 'target',
                       type = 'string',
-                      help = 'set target project: mdk/mdk4/mdk5/iar/vs/vsc/ua/cdk/ses/makefile')
+                      help = 'set target project: mdk/mdk4/mdk5/iar/vs/vsc/ua/cdk/ses/makefile/eclipse')
     AddOption('--genconfig',
                 dest = 'genconfig',
                 action = 'store_true',
@@ -229,6 +229,7 @@ def PrepareBuilding(env, root_directory, has_libcpu=False, remove_components = [
                 'ua':('gcc', 'gcc'),
                 'cdk':('gcc', 'gcc'),
                 'makefile':('gcc', 'gcc'),
+                'eclipse':('gcc', 'gcc'),
                 'ses' : ('gcc', 'gcc')}
     tgt_name = GetOption('target')
 
diff --git a/tools/eclipse.py b/tools/eclipse.py
new file mode 100644
index 0000000000000000000000000000000000000000..dc86c7be5a05cfe693c73b53134b9e7586df0a3f
--- /dev/null
+++ b/tools/eclipse.py
@@ -0,0 +1,299 @@
+import os
+import sys
+import glob
+
+from utils import *
+from utils import _make_path_relative
+from utils import xml_indent
+
+import xml.etree.ElementTree as etree
+from xml.etree.ElementTree import SubElement
+
+source_pattern = ['*.c', '*.cpp', '*.cxx', '*.s', '*.S', '*.asm']
+
+def OSPath(path):
+    import platform
+
+    if type(path) == type('str'):
+        if platform.system() == 'Windows':
+            return path.replace('/', '\\')
+        else:
+            return path.replace('\\', '/')
+    else:
+        if platform.system() == 'Windows':
+            return [item.replace('/', '\\') for item in path]
+        else:
+            return [item.replace('\\', '/') for item in path]
+
+def CollectPaths(paths):
+    all_paths = []
+
+    def ParentPaths(path):
+        ret = os.path.dirname(path)
+        if ret == path or ret == '':
+            return []
+
+        return [ret] + ParentPaths(ret)
+
+    for path in paths:
+        # path = os.path.abspath(path)
+        path = path.replace('\\', '/')
+        all_paths = all_paths + [path] + ParentPaths(path)
+
+    all_paths = list(set(all_paths))
+    return sorted(all_paths)
+
+'''
+Collect all of files under paths
+'''
+def CollectFiles(paths, pattern):
+    files = []
+    for path in paths:
+        if type(pattern) == type(''):
+            files = files + glob.glob(path + '/' + pattern)
+        else:
+            for item in pattern:
+                # print('--> %s' % (path + '/' + item))
+                files = files + glob.glob(path + '/' + item)
+
+    return sorted(files)
+
+def CollectAllFilesinPath(path, pattern):
+    files = []
+
+    for item in pattern:
+        files += glob.glob(path + '/' + item)
+
+    list = os.listdir(path)
+    if len(list):
+        for item in list:
+            if item.startswith('.'):
+                continue
+            if item == 'bsp':
+                continue
+
+            if os.path.isdir(os.path.join(path, item)):
+                files = files + CollectAllFilesinPath(os.path.join(path, item), pattern)
+    return files
+
+'''
+Exclude files from infiles
+'''
+def ExcludeFiles(infiles, files):
+    in_files  = set([OSPath(file) for file in infiles])
+    exl_files = set([OSPath(file) for file in files])
+
+    exl_files = in_files - exl_files
+
+    return exl_files
+
+def ExcludePaths(filepath, paths):
+    ret = []
+
+    files = os.listdir(filepath)
+    for file in files:
+        if file.startswith('.'):
+            continue
+
+        fullname = os.path.join(filepath, file)
+
+        if os.path.isdir(fullname):
+            # print(fullname)
+            if not fullname in paths:
+                ret = ret + [fullname]
+            else:
+                ret = ret + ExcludePaths(fullname, paths)
+
+    return ret
+
+def HandleToolOption(tools, env):
+    project = ProjectInfo(env)
+    BSP_ROOT = os.path.abspath(env['BSP_ROOT'])
+
+    CPPDEFINES = project['CPPDEFINES']
+    paths = ['${ProjDirPath}/' + _make_path_relative(BSP_ROOT, os.path.normpath(i)).replace('\\', '/') for i in project['CPPPATH']]
+
+    for tool in tools:
+        if tool.get('id').find('c.compile') != 1:
+            options = tool.findall('option')
+            for option in options:
+                if option.get('id').find('c.compiler.include.paths') != -1:
+                    # find all of paths in this project
+                    include_paths = option.findall('listOptionValue')
+                    project_paths = []
+                    for item in include_paths:
+                        project_paths += [item.get('value')]
+
+                    if len(project_paths) > 0:
+                        cproject_paths = set(paths) - set(project_paths)
+                    else:
+                        cproject_paths = paths
+
+                    # print('c.compiler.include.paths')
+                    cproject_paths = sorted(cproject_paths)
+                    for item in cproject_paths:
+                        SubElement(option, 'listOptionValue', {'builtIn': 'false', 'value': item})
+
+                if option.get('id').find('c.compiler.defs') != -1:
+                    defs = option.findall('listOptionValue')
+                    project_defs = []
+                    for item in defs:
+                        project_defs += [item.get('value')]
+                    if len(project_defs) > 0:
+                        cproject_defs = set(CPPDEFINES) - set(project_defs)
+                    else:
+                        cproject_defs = CPPDEFINES
+
+                    # print('c.compiler.defs')
+                    cproject_defs = sorted(cproject_defs)
+                    for item in cproject_defs:
+                        SubElement(option, 'listOptionValue', {'builtIn': 'false', 'value': item})
+
+        if tool.get('id').find('c.linker') != -1:
+            options = tool.findall('option')
+            for option in options:
+                if option.get('id').find('c.linker.scriptfile') != -1:
+                    linker_script = 'link.lds'
+                    items = env['LINKFLAGS'].split(' ')
+                    if '-T' in items:
+                        linker_script = items[items.index('-T') + 1]
+                        linker_script = '${ProjDirPath}/' + linker_script
+
+                    # print('c.linker.scriptfile')
+                    listOptionValue = option.find('listOptionValue')
+                    if listOptionValue != None:
+                        listOptionValue.set('value', linker_script)
+                    else:
+                        SubElement(option, 'listOptionValue', {'builtIn': 'false', 'value': linker_script})
+
+                if option.get('id').find('c.linker.nostart') != -1:
+                    if env['LINKFLAGS'].find('-nostartfiles') != -1:
+                        option.set('value', 'true')
+                    else:
+                        option.set('value', 'false')
+
+    return
+
+def HandleRTTRoot(env):
+    bsp_root = env['BSP_ROOT']
+    rtt_root = env['RTT_ROOT']
+
+    if not rtt_root.startswith(bsp_root):
+        to_SubElement = True
+        # print('handle virtual root')
+
+        # always use '/' path separator
+        rtt_root = rtt_root.replace('\\', '/')
+
+        project = etree.parse('.project')
+        root = project.getroot()
+
+        linkedResources = root.find('linkedResources')
+        if linkedResources == None:
+            # add linkedResources
+            linkedResources = SubElement(root, 'linkedResources')
+            # print('add linkedResources')
+        else:
+            links = linkedResources.findall('link')
+            # search exist 'rt-thread' virtual folder
+            for link in links:
+                if link.find('name').text == 'rt-thread':
+                    # handle location
+                    to_SubElement = False
+                    location = link.find('location')
+                    location.text = rtt_root
+
+        if to_SubElement:
+            # print('to subelement for virtual folder')
+            link = SubElement(linkedResources, 'link')
+            name = SubElement(link, 'name')
+            name.text = 'rt-thread'
+            type = SubElement(link, 'type')
+            type.text = '2'
+            location = SubElement(link, 'location')
+            location.text = rtt_root
+
+        out = open('.project', 'w')
+        out.write('<?xml version="1.0" encoding="UTF-8"?>\n')
+        xml_indent(root)
+        out.write(etree.tostring(root, encoding='utf-8'))
+        out.close()
+
+    return
+
+def TargetEclipse(env):
+    global source_pattern
+
+    print('Update eclipse setting...')
+
+    if not os.path.exists('.cproject'):
+        print('no eclipse CDT project found!')
+        return
+
+    HandleRTTRoot(env)
+
+    project = ProjectInfo(env)
+
+    all_paths = [OSPath(path) for path in CollectPaths(project['DIRS'])]
+    # print(all_paths)
+    bsp_root = os.path.abspath(env['BSP_ROOT'])
+
+    exclude_paths = ExcludePaths(bsp_root, all_paths)
+    paths = exclude_paths
+    exclude_paths = []
+    for path in paths:
+        # add bsp and libcpu folder and not collect source files (too more files)
+        if path.endswith('rt-thread\\bsp') or path.endswith('rt-thread\\libcpu'):
+            exclude_paths += [path]
+            continue
+
+        set = CollectAllFilesinPath(path, source_pattern)
+        if len(set):
+            exclude_paths += [path]
+
+    exclude_paths = [_make_path_relative(bsp_root, path).replace('\\', '/') for path in exclude_paths]
+    env['ExPaths'] = exclude_paths
+
+    all_files = CollectFiles(all_paths, source_pattern)
+    src_files = project['FILES']
+
+    exclude_files = ExcludeFiles(all_files, src_files)
+    exclude_files = [_make_path_relative(bsp_root, file).replace('\\', '/') for file in exclude_files]
+    env['ExFiles'] = exclude_files
+
+    cproject = etree.parse('.cproject')
+
+    root = cproject.getroot()
+    cconfigurations = root.findall('storageModule/cconfiguration')
+    for cconfiguration in cconfigurations:
+        tools = cconfiguration.findall('storageModule/configuration/folderInfo/toolChain/tool')
+        HandleToolOption(tools, env)
+
+        sourceEntries = cconfiguration.find('storageModule/configuration/sourceEntries')
+        entry = sourceEntries.find('entry')
+        if entry != None:
+            sourceEntries.remove(entry)
+
+        excluding = exclude_paths + exclude_files
+        excluding = sorted(excluding)
+        value = ''
+        for item in excluding:
+            if value == '':
+                value = item
+            else:
+                value += '|' + item
+        excluding = value
+
+        SubElement(sourceEntries, 'entry', {'excluding': excluding, 'flags': 'VALUE_WORKSPACE_PATH|RESOLVED', 'kind':'sourcePath', 'name':""})
+
+    # write back to .cproject
+    out = open('.cproject', 'w')
+    out.write('<?xml version="1.0" encoding="UTF-8" standalone="no"?>\n')
+    out.write('<?fileVersion 4.0.0?>')
+    xml_indent(root)
+    out.write(etree.tostring(root, encoding='utf-8'))
+    out.close()
+
+    print('done!')
+
+    return