diff --git a/runtime/onnxruntime/src/fsmn-vad-online.cpp b/runtime/onnxruntime/src/fsmn-vad-online.cpp
index b9cda4bd3..a8cc5d8b8 100644
--- a/runtime/onnxruntime/src/fsmn-vad-online.cpp
+++ b/runtime/onnxruntime/src/fsmn-vad-online.cpp
@@ -110,6 +110,7 @@ int FsmnVadOnline::OnlineLfrCmvn(vector<vector<float>> &vad_feats, bool input_fi
                     p.insert(p.end(), vad_feats[vad_feats.size() - 1].begin(), vad_feats[vad_feats.size() - 1].end());
                 }
                 out_feats.emplace_back(p);
+                p.clear();
             } else {
                 lfr_splice_frame_idxs = i;
                 break;
diff --git a/runtime/onnxruntime/src/fsmn-vad.cpp b/runtime/onnxruntime/src/fsmn-vad.cpp
index db633b0b2..c83227405 100644
--- a/runtime/onnxruntime/src/fsmn-vad.cpp
+++ b/runtime/onnxruntime/src/fsmn-vad.cpp
@@ -264,6 +264,7 @@ void FsmnVad::LfrCmvn(std::vector<std::vector<float>> &vad_feats) {
                 p.insert(p.end(), vad_feats[vad_feats.size() - 1].begin(), vad_feats[vad_feats.size() - 1].end());
             }
             out_feats.emplace_back(p);
+            p.clear();
         }
     }
     // Apply cmvn
diff --git a/runtime/onnxruntime/src/paraformer-online.cpp b/runtime/onnxruntime/src/paraformer-online.cpp
index 3b629c59a..d08b57e28 100644
--- a/runtime/onnxruntime/src/paraformer-online.cpp
+++ b/runtime/onnxruntime/src/paraformer-online.cpp
@@ -164,6 +164,7 @@ int ParaformerOnline::OnlineLfrCmvn(vector<vector<float>> &wav_feats, bool input
                     p.insert(p.end(), wav_feats[wav_feats.size() - 1].begin(), wav_feats[wav_feats.size() - 1].end());
                 }
                 out_feats.emplace_back(p);
+                p.clear();
             } else {
                 lfr_splice_frame_idxs = i;
                 break;
diff --git a/runtime/onnxruntime/src/paraformer.cpp b/runtime/onnxruntime/src/paraformer.cpp
index 9e8e3361d..4e89ea28c 100644
--- a/runtime/onnxruntime/src/paraformer.cpp
+++ b/runtime/onnxruntime/src/paraformer.cpp
@@ -436,6 +436,7 @@ void Paraformer::LfrCmvn(std::vector<std::vector<float>> &asr_feats) {
                 p.insert(p.end(), asr_feats[asr_feats.size() - 1].begin(), asr_feats[asr_feats.size() - 1].end());
             }
             out_feats.emplace_back(p);
+            p.clear();
         }
     }
     // Apply cmvn