diff --git a/imperative/python/src/tensor_utils.cpp b/imperative/python/src/tensor_utils.cpp
index 62cfd861..4e7e1f34 100644
--- a/imperative/python/src/tensor_utils.cpp
+++ b/imperative/python/src/tensor_utils.cpp
@@ -1066,7 +1066,31 @@ py::object _adaptive_pool2d_cpp(
         py::handle inp_hdl, py::handle shape_val_hdl, py::handle pool_mode_hdl) {
     py::object shape_hdl = py::reinterpret_borrow<py::object>(shape_val_hdl);
     py::list shps(0);
-    if (!PyTuple_Check(shape_val_hdl.ptr())) {
+    auto mode_string = pool_mode_hdl.cast<std::string>();
+    ::megdnn::param::AdaptivePooling::Mode pool_mode =
+            ::megdnn::param::AdaptivePooling::Mode::MAX;
+    if (mode_string.compare(std::string("AVERAGE")) == 0) {
+        pool_mode = ::megdnn::param::AdaptivePooling::Mode::AVERAGE;
+    }
+    std::shared_ptr<OpDef> op;
+    std::vector<PyObject*> p;
+    auto pool_format = ::megdnn::param::AdaptivePooling::Format::NCHW;
+    auto inp_format = getattr(inp_hdl, "format").cast<std::string>();
+    if (inp_format == "nhwc") {
+        pool_format = ::megdnn::param::AdaptivePooling::Format::NHWC;
+    }
+    if (TensorWrapper::try_cast(shape_val_hdl.ptr())) {
+        std::vector<int32_t> shp;
+        op = AdaptivePooling::make(pool_mode, pool_format, shp);
+        py::object Op = py::cast(op);
+        p.resize(3);
+        p[0] = Op.ptr();
+        p[1] = inp_hdl.ptr();
+        p[2] = shape_val_hdl.ptr();
+        py::tuple ret =
+                py::reinterpret_steal<py::object>(py_apply(NULL, p.data(), p.size()));
+        return ret[0];
+    } else if (!PyTuple_Check(shape_val_hdl.ptr())) {
         shps.append(PyLong_AsLong(shape_val_hdl.ptr()));
         shps.append(PyLong_AsLong(shape_val_hdl.ptr()));
 
@@ -1078,19 +1102,11 @@ py::object _adaptive_pool2d_cpp(
     } catch (py::error_already_set& err) {
         shape_tuple = py::reinterpret_borrow<py::object>(shape_hdl);
     }
-    auto mode_string = pool_mode_hdl.cast<std::string>();
-    ::megdnn::param::AdaptivePooling::Mode pool_mode =
-            ::megdnn::param::AdaptivePooling::Mode::MAX;
-    if (mode_string.compare(std::string("AVERAGE")) == 0) {
-        pool_mode = ::megdnn::param::AdaptivePooling::Mode::AVERAGE;
-    }
+
     auto [shape, fastpath] = tuple2vector(shape_tuple);
     fastpath &= enable_fastpath(inp_hdl);
-    std::shared_ptr<OpDef> op;
-    std::vector<PyObject*> p;
     py::object shape_tensor;
-    op = AdaptivePooling::make(
-            pool_mode, ::megdnn::param::AdaptivePooling::Format::NCHW, shape);
+    op = AdaptivePooling::make(pool_mode, pool_format, shape);
     if (fastpath) {
         p.resize(2);
     } else {
diff --git a/imperative/src/impl/ops/adaptive_pooling.cpp b/imperative/src/impl/ops/adaptive_pooling.cpp
index fbd972fc..5701b9c5 100644
--- a/imperative/src/impl/ops/adaptive_pooling.cpp
+++ b/imperative/src/impl/ops/adaptive_pooling.cpp
@@ -39,6 +39,7 @@ std::tuple<SmallVector<LogicalTensorDesc>, bool> infer_output_attrs_fallible(
 
     const dt_int32* oshp2d = nullptr;
     dst_layout.ndim = 4u;
+    bool tshp1n = false;
     if (nr_inp == 1) {
         oshp2d = pool.shape.data();
     } else {
@@ -51,17 +52,18 @@ std::tuple<SmallVector<LogicalTensorDesc>, bool> infer_output_attrs_fallible(
                 "target shape of AdaptivePooling expects ndim=1; got ndim=%lu actually",
                 tshp.layout.ndim);
         oshp2d = tshp.value.ptr<dt_int32>();
+        tshp1n = tshp.layout.total_nr_elems() == 1;
     }
     auto param_format = pool.param().format;
     if (param_format == opr::AdaptivePooling::Param::Format::NCHW) {
         dst_layout[0] = src.layout[0];
         dst_layout[1] = src.layout[1];
         dst_layout[2] = oshp2d[0];
-        dst_layout[3] = oshp2d[1];
+        dst_layout[3] = tshp1n ? oshp2d[0] : oshp2d[1];
     } else if (param_format == opr::AdaptivePooling::Param::Format::NHWC) {
         dst_layout[0] = src.layout[0];
         dst_layout[1] = oshp2d[0];
-        dst_layout[2] = oshp2d[1];
+        dst_layout[2] = tshp1n ? oshp2d[0] : oshp2d[1];
         dst_layout[3] = src.layout[3];
     } else {
         mgb_throw(MegBrainError, "AdaptivePooling only support NCHW or NHWC format");
@@ -83,8 +85,10 @@ SmallVector<TensorPtr> apply_on_physical_tensor(
     if (!validated) {
         dst_layout.ndim = src_layout.ndim;
         const dt_int32* oshp2d = nullptr;
+        bool tshp1n = false;
         if (inputs.size() == 2) {
             auto&& tshp_nd = inputs[1];
+            tshp1n = inputs[1]->layout().total_nr_elems() == 1;
             oshp2d = tshp_nd->get_value().proxy_to_default_cpu().ptr<dt_int32>();
         } else {
             oshp2d = pool.shape.data();
@@ -93,11 +97,11 @@ SmallVector<TensorPtr> apply_on_physical_tensor(
             dst_layout[0] = src_layout[0];
             dst_layout[1] = src_layout[1];
             dst_layout[2] = oshp2d[0];
-            dst_layout[3] = oshp2d[1];
+            dst_layout[3] = tshp1n ? oshp2d[0] : oshp2d[1];
         } else if (param_format == opr::AdaptivePooling::Param::Format::NHWC) {
             dst_layout[0] = src_layout[0];
             dst_layout[1] = oshp2d[0];
-            dst_layout[2] = oshp2d[1];
+            dst_layout[2] = tshp1n ? oshp2d[0] : oshp2d[1];
             dst_layout[3] = src_layout[3];
         } else {
             mgb_throw(
diff --git a/src/opr/impl/dnn/adaptive_pooling.cpp b/src/opr/impl/dnn/adaptive_pooling.cpp
index 17c8088d..fe6e0c1a 100644
--- a/src/opr/impl/dnn/adaptive_pooling.cpp
+++ b/src/opr/impl/dnn/adaptive_pooling.cpp
@@ -39,22 +39,23 @@ void AdaptivePoolingForward::outshape_by_symvar_do_get_output_shape(
     cg::copy_tensor_value_to_shape(oshp2d, *shpinfo.shpval_inp_val.at(0));
     auto src = shpinfo.shape_inp_shp.at(0);
     mgb_assert(
-            src.ndim == 4 && oshp2d.ndim == 2,
+            src.ndim == 4 && (oshp2d.ndim == 2 || oshp2d.ndim == 1),
             "shape mismatch for AdaptivePooling: src=%s, out2d=%s",
             src.to_string().c_str(), oshp2d.to_string().c_str());
 
     auto param_format = param().format;
+    bool tshp1n = oshp2d.ndim == 1;
     if (param_format == Param::Format::NCHW) {
         dest.ndim = 4;
         dest.shape[0] = src.shape[0];
         dest.shape[1] = src.shape[1];
         dest.shape[2] = oshp2d.shape[0];
-        dest.shape[3] = oshp2d.shape[1];
+        dest.shape[3] = (tshp1n) ? oshp2d.shape[0] : oshp2d.shape[1];
     } else if (param_format == Param::Format::NHWC) {
         dest.ndim = 4;
         dest.shape[0] = src.shape[0];
         dest.shape[1] = oshp2d.shape[0];
-        dest.shape[2] = oshp2d.shape[1];
+        dest.shape[2] = (tshp1n) ? oshp2d.shape[0] : oshp2d.shape[1];
         dest.shape[3] = src.shape[3];
     } else {
         mgb_throw(MegBrainError, "AdaptivePooling only support NCHW or NHWC format");