diff --git a/include/cuda/cuda_split_concat.h b/include/cuda/cuda_split_concat.h
index 699f15bc..58bdf330 100644
--- a/include/cuda/cuda_split_concat.h
+++ b/include/cuda/cuda_split_concat.h
@@ -3,7 +3,7 @@
 #include <cstdio>
 
 const int BATCH_SIZE = 32; // parallel tensor number.
-const int DIM_MAX_SIZE = 4;
+const int DIM_MAX_SIZE = 8;
 
 // Concat operator acts like element tensors composing to one big tensor,and
 // split operator acts like one big tensor being composed by element
diff --git a/test/kernels/cuda/test_cuda_concat.cc b/test/kernels/cuda/test_cuda_concat.cc
index 013d25b5..2c76f405 100644
--- a/test/kernels/cuda/test_cuda_concat.cc
+++ b/test/kernels/cuda/test_cuda_concat.cc
@@ -122,4 +122,40 @@ TEST(Concat, Cuda_dim0) {
     EXPECT_TRUE(oCpu->equalData(vector<float>{0, 1, 2, 1, 1, 1, 0, 1, 2}));
 }
 
+TEST(Concat, CudaHigh) {
+    Runtime runtime = NativeCpuRuntimeObj::getInstance();
+    Graph gCpu = make_ref<GraphObj>(runtime);
+
+    auto t1 = gCpu->addTensor({2, 2, 3, 1, 2}, DataType::Float32);
+    auto t2 = gCpu->addTensor({2, 2, 1, 1, 2}, DataType::Float32);
+    auto t3 = gCpu->addTensor({2, 2, 2, 1, 2}, DataType::Float32);
+    gCpu->dataMalloc();
+    t1->setData(IncrementalGenerator());
+    t2->setData(OneGenerator());
+    t3->setData(OneGenerator());
+
+    auto cudaRuntime = make_ref<CudaRuntimeObj>();
+    Graph gCuda = make_ref<GraphObj>(cudaRuntime);
+
+    auto t1Gpu = gCuda->cloneTensor(t1);
+    auto t2Gpu = gCuda->cloneTensor(t2);
+    auto t3Gpu = gCuda->cloneTensor(t3);
+
+    auto op =
+        gCuda->addOp<ConcatObj>(TensorVec{t1Gpu, t2Gpu, t3Gpu}, nullptr, 2);
+    gCuda->dataMalloc();
+    t1Gpu->setData(IncrementalGenerator());
+    t2Gpu->setData(OneGenerator());
+    t3Gpu->setData(OneGenerator());
+    cudaRuntime->run(gCuda);
+
+    // cudaPrintTensor(op->getOutput());
+    //  copy output from CUDA to CPU
+    auto oCpu = gCpu->cloneTensor(op->getOutput());
+    EXPECT_TRUE(oCpu->equalData(
+        vector<float>{0.,  1.,  2.,  3.,  4.,  5.,  1., 1., 1., 1., 1., 1.,
+                      6.,  7.,  8.,  9.,  10., 11., 1., 1., 1., 1., 1., 1.,
+                      12., 13., 14., 15., 16., 17., 1., 1., 1., 1., 1., 1.,
+                      18., 19., 20., 21., 22., 23., 1., 1., 1., 1., 1., 1.}));
+}
 } // namespace infini
diff --git a/test/kernels/cuda/test_cuda_split.cc b/test/kernels/cuda/test_cuda_split.cc
index 5a32f27f..2cab944e 100644
--- a/test/kernels/cuda/test_cuda_split.cc
+++ b/test/kernels/cuda/test_cuda_split.cc
@@ -39,6 +39,40 @@ TEST(Split, Cuda) {
         12, 13, 14, 15, 16, 17, 18, 19, 32, 33, 34, 35, 36, 37, 38, 39}));
 }
 
+TEST(Split, CudaHigh) {
+    Runtime runtime = NativeCpuRuntimeObj::getInstance();
+    Graph gCpu = make_ref<GraphObj>(runtime);
+
+    auto input = gCpu->addTensor({2, 6, 2, 1, 2}, DataType::Float32);
+    gCpu->dataMalloc();
+    input->setData(IncrementalGenerator());
+
+    auto cudaRuntime = make_ref<CudaRuntimeObj>();
+    Graph gCuda = make_ref<GraphObj>(cudaRuntime);
+
+    auto inputGpu = gCuda->cloneTensor(input);
+    auto op = gCuda->addOp<SplitObj>(inputGpu, std::nullopt, 1, 3);
+    gCuda->dataMalloc();
+    inputGpu->setData(IncrementalGenerator());
+
+    cudaRuntime->run(gCuda);
+
+    //  copy output from CUDA to CPU
+    EXPECT_EQ(op->getOutputs().size(), (size_t)3);
+    auto o0Cpu = gCpu->cloneTensor(op->getOutput(0));
+    auto o1Cpu = gCpu->cloneTensor(op->getOutput(1));
+    auto o2Cpu = gCpu->cloneTensor(op->getOutput(2));
+    EXPECT_TRUE(
+        o0Cpu->equalData(vector<float>{0., 1., 2., 3., 4., 5., 6., 7., 24., 25.,
+                                       26., 27., 28., 29., 30., 31.}));
+    EXPECT_TRUE(o1Cpu->equalData(vector<float>{8., 9., 10., 11., 12., 13., 14.,
+                                               15., 32., 33., 34., 35., 36.,
+                                               37., 38., 39.}));
+    EXPECT_TRUE(o2Cpu->equalData(vector<float>{16., 17., 18., 19., 20., 21.,
+                                               22., 23., 40., 41., 42., 43.,
+                                               44., 45., 46., 47.}));
+}
+
 TEST(Split, Cuda_dim0) {
     Runtime runtime = NativeCpuRuntimeObj::getInstance();
     Graph gCpu = make_ref<GraphObj>(runtime);