diff --git a/paddle/fluid/operators/fusion_lstm_op.cc b/paddle/fluid/operators/fusion_lstm_op.cc
index 604c6f183979e8f21c32b51ff6690ab04f06d4e4..97852e292834b22dd1aebb6ff8f5dd2b7cb39dd6 100644
--- a/paddle/fluid/operators/fusion_lstm_op.cc
+++ b/paddle/fluid/operators/fusion_lstm_op.cc
@@ -230,6 +230,22 @@ class FuisonLSTMKernel : public framework::OpKernel<T> {
     auto* hidden_out = ctx.Output<LoDTensor>("Hidden");
     auto* cell_out = ctx.Output<LoDTensor>("Cell");
 
+    std::function<void(const int, const T *, T *)> act_gate, act_cell, act_cand;
+    auto& act_gate_str = ctx.Attr<std::string>("gate_activation");
+    auto& act_cell_str = ctx.Attr<std::string>("cell_activation");
+    auto& act_cand_str = ctx.Attr<std::string>("candidate_activation");
+    if (platform::jit::MayIUse(platform::jit::avx)) {
+      math::VecActivations<T, platform::jit::avx> act_functor;
+      act_gate = act_functor(act_gate_str);
+      act_cell = act_functor(act_cell_str);
+      act_cand = act_functor(act_cand_str);
+    } else {
+      math::VecActivations<T, platform::jit::isa_any> act_functor;
+      act_gate = act_functor(act_gate_str);
+      act_cell = act_functor(act_cell_str);
+      act_cand = act_functor(act_cand_str);
+    }
+
     auto x_lod = x->lod();
     auto x_dims = x->dims();            // T x M
     auto wh_dims = wh->dims();          // D x 4D
@@ -263,15 +279,12 @@ class FuisonLSTMKernel : public framework::OpKernel<T> {
         prev_cell_data = c0_data + i * D;
       } else {
         // W_ch, W_ih, W_fh, W_oh
-        // actgate
-        math::vec_sigmoid<T>(D3, xx_data + D, xx_data + D);
-        // ch gate
-        math::vec_tanh<T>(D, xx_data, xx_data);
+        act_gate(D3, xx_data + D, xx_data + D);
+        act_cand(D, xx_data, xx_data);
         // cell out= input*tilde
         blas.VMUL(D, xx_data, xx_data + D, cell_out_data);
         // hidden out= act_state(cellout) * outgate
-        // act state
-        math::vec_tanh<T>(D, cell_out_data, xx_data + D2);
+        act_cell(D, cell_out_data, xx_data + D2);
         blas.VMUL(D, xx_data + D2, xx_data + D3, hidden_out_data);
 
         // prev
@@ -290,10 +303,8 @@ class FuisonLSTMKernel : public framework::OpKernel<T> {
                   D4);
 
         // W_ch, W_ih, W_fh, W_oh
-        // actgate
-        math::vec_sigmoid<T>(D3, xx_data + D, xx_data + D);
-        // ch gate
-        math::vec_tanh<T>(D, xx_data, xx_data);
+        act_gate(D3, xx_data + D, xx_data + D);
+        act_cand(D, xx_data, xx_data);
 
         // a = forget * prev_cell
         blas.VMUL(D, xx_data + D2, prev_cell_data, xx_data + D2);
@@ -305,8 +316,7 @@ class FuisonLSTMKernel : public framework::OpKernel<T> {
         blas.VADD(D, xx_data + D, xx_data + D2, cell_out_data);
 
         // hidden out= act_state(cellout) * outgate
-        // act state
-        math::vec_tanh<T>(D, cell_out_data, xx_data + D2);
+        act_cell(D, cell_out_data, xx_data + D2);
         blas.VMUL(D, xx_data + D2, xx_data + D3, hidden_out_data);
 
         // prev
diff --git a/python/paddle/fluid/tests/unittests/test_fusion_lstm_op.py b/python/paddle/fluid/tests/unittests/test_fusion_lstm_op.py
index 9d8bef677fd16fb6bdc20b929137b4d885f4efd1..d807f0a8b6342bdc166ac7dd898aae9331e8c513 100644
--- a/python/paddle/fluid/tests/unittests/test_fusion_lstm_op.py
+++ b/python/paddle/fluid/tests/unittests/test_fusion_lstm_op.py
@@ -45,7 +45,7 @@ def fusion_lstm(
 
 class TestLstmOp(OpTest):
     def set_argument(self):
-        self.lod = [[2, 3, 2]]
+        pass
 
     def setUp(self):
         self.op_type = 'fusion_lstm'