diff --git a/source/tnn/network/tensorrt/layer_builder/upsample_layer_builder.cc b/source/tnn/network/tensorrt/layer_builder/upsample_layer_builder.cc
index 4a8d9c840..721a32b5a 100644
--- a/source/tnn/network/tensorrt/layer_builder/upsample_layer_builder.cc
+++ b/source/tnn/network/tensorrt/layer_builder/upsample_layer_builder.cc
@@ -66,24 +66,19 @@ ILayer* UpsampleTRTPluginLayerBuilder::AddToNetwork(INetworkDefinition* network)
         layer->setName(layer_name_.c_str());
         if (input_blobs_.size() == 1) {
             if (!paramlist->dims.empty()) {
-                if (!output_dims.empty()) {
-                    nvinfer1::Dims4 dims(output_dims[0], output_dims[1], output_dims[2], output_dims[3]);
-                    layer->setOutputDimensions(dims);
-                } else {
-                    if (input_tensor->getDimensions().nbDims != 4) {
-                        LOGE("Upsample with 1 input only support 4d input.");
-                        return nullptr;
-                    }
-                    if (paramlist->dims.size() != 2 ||
-                        paramlist->dims[0] <= 0 || paramlist->dims[1] <= 0) {
-                        LOGE("Upsample with 1 input should have positive 2-element param->dims.");
-                        return nullptr;
-                    }
-                    auto trt_dim = input_tensor->getDimensions();
-                    // trt_dim may have one of the following values:
-                    // [-1,3,32,32], [-1,2,-1,-1], [1,16,256,256]
-                    if ((trt_dim.d[0] <= 0 || trt_dim.d[1] <= 0) &&
-                        (trt_dim.d[2] > 0 && trt_dim.d[3] > 0)) {
+                auto trt_dim = input_tensor->getDimensions();
+                if (trt_dim.nbDims != 4) {
+                    LOGE("Upsample with 1 input only support 4d input.");
+                    return nullptr;
+                }
+
+                // trt_dim may have one of the following values:
+                // [-1,3,32,32], [-1,2,-1,-1], [1,16,256,256]
+                if (trt_dim.d[0] <= 0 || trt_dim.d[1] <= 0) {
+                    // Cases When At least One of N, C be dynamic
+                    if (trt_dim.d[2] > 0 && trt_dim.d[3] > 0) {
+                        // Cases when H,W are fixed, turn to scale mode
+                        // e.g [-1,3,32,32]
                         float scale[4];
                         scale[0] = 1;
                         scale[1] = 1;
@@ -91,9 +86,29 @@ ILayer* UpsampleTRTPluginLayerBuilder::AddToNetwork(INetworkDefinition* network)
                         scale[3] = paramlist->dims[1] / float(trt_dim.d[3]);
                         layer->setScales(scale, 4);
                     } else {
-                        // WARNING, trt_dims may have -1 values.
-                        nvinfer1::Dims4 dims(trt_dim.d[0], trt_dim.d[1], paramlist->dims[0], paramlist->dims[1]);
+                        // Cases When Both N,C and H+W are dynamic
+                        // In this case, We cannot turn to Scale mode.
+                        // Also layer->SetOutputDimensions() API does not accept -1 as dim
+                        // Have to use TNN Upsample Plugin.
+                        // e.g [-1,2,-1,-1]
+                        LOGI("WARNING: Dynamic NCHW Upsample with fixed dims provided, NOT SUPPORTED by TensorRT, use TNN Upsample Plugin instead.");
+                        return TensorRTPluginLayerBuilder::AddToNetwork(network); 
+                    }
+                } else {
+                    // Cases When Both N and C are fixed
+                    // e.g [1,16,256,256]
+                    if (!output_dims.empty() && output_dims[2] > 0 && output_dims[3] > 0) {
+                        nvinfer1::Dims4 dims(trt_dim.d[0], trt_dim.d[1], 
+                            output_dims[2], output_dims[3]);
                         layer->setOutputDimensions(dims);
+                    } else if (paramlist->dims.size() >= 2 && 
+                               paramlist->dims[0] > 0 && paramlist->dims[1] > 0) {
+                        nvinfer1::Dims4 dims(trt_dim.d[0], trt_dim.d[1], 
+                            paramlist->dims[0], paramlist->dims[1]);
+                        layer->setOutputDimensions(dims);
+                    } else {
+                        LOGE("Upsample with 1 input Fix N,C + Fixed dims does not have standard positive dim, Unsupported.");
+                        return nullptr;
                     }
                 }
             } else {