diff --git a/demo/prune/train.py b/demo/prune/train.py
index 2fd535399a7163dcc29661ce4c4f8abfdd35bbca..ba5e3486ee5cbe530f7d0c3b97b737fdfd030334 100644
--- a/demo/prune/train.py
+++ b/demo/prune/train.py
@@ -8,10 +8,10 @@ import math
 import time
 import numpy as np
 import paddle.fluid as fluid
+sys.path[0] = os.path.join(os.path.dirname("__file__"), os.path.pardir)
 from paddleslim.prune import Pruner, save_model
 from paddleslim.common import get_logger
 from paddleslim.analysis import flops
-sys.path.append(sys.path[0] + "/../")
 import models
 from utility import add_arguments, print_arguments
 
diff --git a/demo/quant/quant_aware/train.py b/demo/quant/quant_aware/train.py
index 7cb088b440f4037203c837830b1b853ad99ab100..996b040539c624bbe33295a1e62fd685f0a2c0f0 100644
--- a/demo/quant/quant_aware/train.py
+++ b/demo/quant/quant_aware/train.py
@@ -8,8 +8,8 @@ import math
 import time
 import numpy as np
 import paddle.fluid as fluid
-sys.path.append(sys.path[0] + "/../../../")
-sys.path.append(sys.path[0] + "/../../")
+sys.path[0] = os.path.join(
+    os.path.dirname("__file__"), os.path.pardir, os.path.pardir)
 from paddleslim.common import get_logger
 from paddleslim.analysis import flops
 from paddleslim.quant import quant_aware, quant_post, convert
diff --git a/demo/quant/quant_post/eval.py b/demo/quant/quant_post/eval.py
index 8d5cfa003d8b7077224ae2f54194069aadc3dc90..d7414b0973226425e9627137c185a39f26603fb9 100755
--- a/demo/quant/quant_post/eval.py
+++ b/demo/quant/quant_post/eval.py
@@ -20,7 +20,8 @@ import functools
 
 import paddle
 import paddle.fluid as fluid
-sys.path.append('../../')
+sys.path[0] = os.path.join(
+    os.path.dirname("__file__"), os.path.pardir, os.path.pardir)
 import imagenet_reader as reader
 from utility import add_arguments, print_arguments
 
diff --git a/demo/quant/quant_post/export_model.py b/demo/quant/quant_post/export_model.py
index dbfeb2b042139ec85b390ccd6f242c0aa93e8835..be3751bc55a512fc51d6d3f10334d61c112042e3 100755
--- a/demo/quant/quant_post/export_model.py
+++ b/demo/quant/quant_post/export_model.py
@@ -8,9 +8,9 @@ import math
 import time
 import numpy as np
 import paddle.fluid as fluid
-sys.path.append(sys.path[0] + "/../../../")
+sys.path[0] = os.path.join(
+    os.path.dirname("__file__"), os.path.pardir, os.path.pardir)
 from paddleslim.common import get_logger
-sys.path.append(sys.path[0] + "/../../")
 import models
 from utility import add_arguments, print_arguments
 
diff --git a/demo/quant/quant_post/quant_post.py b/demo/quant/quant_post/quant_post.py
index 5691402122540f4426e1e1e63f6642cd10cfcb4c..96f8dca60e928056aa6761501d9355b569161e53 100755
--- a/demo/quant/quant_post/quant_post.py
+++ b/demo/quant/quant_post/quant_post.py
@@ -9,10 +9,10 @@ import time
 import numpy as np
 import paddle.fluid as fluid
 
-sys.path.append(sys.path[0] + "/../../../")
+sys.path[0] = os.path.join(
+    os.path.dirname("__file__"), os.path.pardir, os.path.pardir)
 from paddleslim.common import get_logger
 from paddleslim.quant import quant_post
-sys.path.append(sys.path[0] + "/../../")
 from utility import add_arguments, print_arguments
 import imagenet_reader as reader
 _logger = get_logger(__name__, level=logging.INFO)