diff --git a/paddleslim/quant/quanter.py b/paddleslim/quant/quanter.py
index 2522fed7e1d7340b0ae9271b1160862b0f70273f..7e18421ce27cacd5736305e3119770ee62f7297a 100755
--- a/paddleslim/quant/quanter.py
+++ b/paddleslim/quant/quanter.py
@@ -173,6 +173,42 @@ def _parse_configs(user_config):
 
     return configs
 
+def _remove_unused_var_nodes(graph):
+    all_used_vars = set()
+    ops = graph.all_op_nodes()
+    for op_node in ops:
+        for input_node in op_node.inputs:
+            all_used_vars.add(input_node)
+        for output_node in op_node.outputs:
+            all_used_vars.add(output_node)
+
+    all_used_vars = {n.node for n in all_used_vars}
+    all_unused_vars = {
+        n
+        for n in filter(lambda node: node.node not in all_used_vars,
+                        graph.all_var_nodes())
+    }
+    graph.safe_remove_nodes(all_unused_vars)
+    return graph
+
+def _apply_pass(scope, graph, pass_name, attrs=None,
+                attr_values=None, debug=False):
+    ir_pass = core.get_pass(pass_name)
+    cpp_graph = graph.graph
+    if not cpp_graph.has('__param_scope__'):
+        cpp_graph.set_not_owned('__param_scope__', scope)
+    if attrs:
+        assert attr_values and len(attrs) == len(
+            attr_values
+        ), "Different number of pass attributes and their values."
+        for attr, value in zip(attrs, attr_values):
+            ir_pass.set(attr, value)
+    ir_pass.apply(cpp_graph)
+    if debug:
+        graph.draw('.', 'qat_fp32_{}'.format(pass_name),
+                    graph.all_op_nodes())
+    _remove_unused_var_nodes(graph)
+    return graph
 
 def quant_aware(program,
                 place,
@@ -242,6 +278,12 @@ def quant_aware(program,
 
     main_graph = IrGraph(core.Graph(program.desc), for_test=for_test)
 
+
+    graph = _apply_pass(scope, main_graph, 'conv_bn_fuse_pass')
+    graph = _apply_pass(scope, main_graph, 'depthwise_conv_bn_fuse_pass')
+    graph = _apply_pass(scope, main_graph, 'conv_eltwiseadd_bn_fuse_pass')
+    graph = _apply_pass(scope, main_graph, 'depthwise_conv_eltwiseadd_bn_fuse_pass')
+
     transform_pass_ops = []
     quant_dequant_ops = []
     for op_type in config['quantize_op_types']: