diff --git a/cmake/OpenCVFindCANN.cmake b/cmake/OpenCVFindCANN.cmake
index b0b8e35c6b..e1cd054a37 100644
--- a/cmake/OpenCVFindCANN.cmake
+++ b/cmake/OpenCVFindCANN.cmake
@@ -5,13 +5,24 @@ if("cann${CANN_INSTALL_DIR}" STREQUAL "cann" AND DEFINED ENV{ASCEND_TOOLKIT_HOME
     message(STATUS "CANN: updated CANN_INSTALL_DIR from ASCEND_TOOLKIT_HOME=$ENV{ASCEND_TOOLKIT_HOME}")
 endif()
 
+if(EXISTS "${CANN_INSTALL_DIR}/opp/op_proto/built-in/inc")
+    set(CANN_VERSION_BELOW_6_3_ALPHA002 "YES" )
+    add_definitions(-DCANN_VERSION_BELOW_6_3_ALPHA002="YES")
+endif()
+
 if(CANN_INSTALL_DIR)
+    # Supported system: UNIX
+    if(NOT UNIX)
+        set(HAVE_CANN OFF)
+        message(WARNING "CANN: CANN toolkit supports unix but not ${CMAKE_SYSTEM_NAME}. Turning off HAVE_CANN")
+        return()
+    endif()
     # Supported platforms: x86-64, arm64
     if(CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
     elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64" OR CMAKE_SYSTEM_PROCESSOR STREQUAL "amd64")
     else()
         set(HAVE_CANN OFF)
-        message(STATUS "CANN: CANN toolkit supports x86-64 and arm64 but not ${CMAKE_SYSTEM_PROCESSOR}. Turning off HAVE_CANN")
+        message(WARNING "CANN: CANN toolkit supports x86-64 and arm64 but not ${CMAKE_SYSTEM_PROCESSOR}. Turning off HAVE_CANN")
         return()
     endif()
 
@@ -31,7 +42,7 @@ if(CANN_INSTALL_DIR)
         set(lib_ascendcl ${found_lib_ascendcl})
         message(STATUS "CANN: libascendcl.so is found at ${lib_ascendcl}")
     else()
-        message(STATUS "CANN: Missing libascendcl.so. Turning off HAVE_CANN")
+        message(WARNING "CANN: Missing libascendcl.so. Turning off HAVE_CANN")
         set(HAVE_CANN OFF)
         return()
     endif()
@@ -42,7 +53,7 @@ if(CANN_INSTALL_DIR)
         set(lib_graph ${found_lib_graph})
         message(STATUS "CANN: libgraph.so is found at ${lib_graph}")
     else()
-        message(STATUS "CANN: Missing libgraph.so. Turning off HAVE_CANN")
+        message(WARNING "CANN: Missing libgraph.so. Turning off HAVE_CANN")
         set(HAVE_CANN OFF)
         return()
     endif()
@@ -53,29 +64,49 @@ if(CANN_INSTALL_DIR)
         set(lib_ge_compiler ${found_lib_ge_compiler})
         message(STATUS "CANN: libge_compiler.so is found at ${lib_ge_compiler}")
     else()
-        message(STATUS "CANN: Missing libge_compiler.so. Turning off HAVE_CANN")
+        message(WARNING "CANN: Missing libge_compiler.so. Turning off HAVE_CANN")
         set(HAVE_CANN OFF)
         return()
     endif()
     #  * libopsproto.so
-    set(lib_opsproto "${CANN_INSTALL_DIR}/opp/op_proto/built-in")
+    if (CANN_VERSION_BELOW_6_3_ALPHA002)
+        set(lib_opsproto "${CANN_INSTALL_DIR}/opp/op_proto/built-in/")
+    else()
+        if(EXISTS "${CANN_INSTALL_DIR}/opp/built-in/op_proto/lib/linux")
+            set(lib_opsproto "${CANN_INSTALL_DIR}/opp/built-in/op_proto/lib/linux/${CMAKE_HOST_SYSTEM_PROCESSOR}")
+        else()
+            set(lib_opsproto "${CANN_INSTALL_DIR}/opp/built-in/op_proto")
+        endif()
+    endif()
     find_library(found_lib_opsproto NAMES opsproto PATHS ${lib_opsproto} NO_DEFAULT_PATH)
     if(found_lib_opsproto)
         set(lib_opsproto ${found_lib_opsproto})
         message(STATUS "CANN: libopsproto.so is found at ${lib_opsproto}")
     else()
-        message(STATUS "CANN: Missing libopsproto.so. Turning off HAVE_CANN")
+        message(WARNING "CANN: Missing libopsproto.so can't found at ${lib_opsproto}. Turning off HAVE_CANN")
         set(HAVE_CANN OFF)
         return()
     endif()
 
-
     set(libs_cann "")
     list(APPEND libs_cann ${lib_ascendcl})
     list(APPEND libs_cann ${lib_opsproto})
     list(APPEND libs_cann ${lib_graph})
     list(APPEND libs_cann ${lib_ge_compiler})
 
+    #  * lib_graph_base.so
+    if(NOT CANN_VERSION_BELOW_6_3_ALPHA002)
+        set(lib_graph_base "${CANN_INSTALL_DIR}/compiler/lib64")
+        find_library(found_libgraph_base NAMES graph_base PATHS ${lib_graph_base} NO_DEFAULT_PATH)
+        if(found_libgraph_base)
+            set(lib_graph_base ${found_libgraph_base})
+            message(STATUS "CANN: lib_graph_base.so is found at ${lib_graph_base}")
+            list(APPEND libs_cann ${lib_graph_base})
+        else()
+            message(STATUS "CANN: Missing lib_graph_base.so. It is only required after cann version 6.3.RC1.alpha002")
+        endif()
+    endif()
+
     try_compile(VALID_ASCENDCL
         "${OpenCV_BINARY_DIR}"
         "${OpenCV_SOURCE_DIR}/cmake/checks/cann.cpp"
diff --git a/modules/dnn/src/net_cann.cpp b/modules/dnn/src/net_cann.cpp
index a3eb52200f..103c7c8dd2 100644
--- a/modules/dnn/src/net_cann.cpp
+++ b/modules/dnn/src/net_cann.cpp
@@ -304,9 +304,9 @@ std::shared_ptr<ge::ModelBufferData> compileCannGraph(std::shared_ptr<ge::Graph>
         bool ok;
         if ((child=fork()) == 0)
         {
-            // initialize engine
+            // initialize engine   Ascend310/Ascend310P3/Ascend910B/Ascend310B
             std::map<ge::AscendString, ge::AscendString> options = {
-                {ge::AscendString(ge::ir_option::SOC_VERSION), ge::AscendString("Ascend310")},
+                {ge::AscendString(ge::ir_option::SOC_VERSION), ge::AscendString(aclrtGetSocName())},
             };
             ACL_CHECK_GRAPH_RET(ge::aclgrphBuildInitialize(options));
 
diff --git a/modules/dnn/src/op_cann.hpp b/modules/dnn/src/op_cann.hpp
index c60c311b7f..1d15eab6a3 100644
--- a/modules/dnn/src/op_cann.hpp
+++ b/modules/dnn/src/op_cann.hpp
@@ -10,7 +10,11 @@
 #include "graph/graph.h" // ge::Graph; ge::Operator from operator.h
 #include "graph/ge_error_codes.h" // GRAPH_SUCCESS, ...
 
-#include "op_proto/built-in/inc/all_ops.h" // ge::Conv2D, ...
+#ifdef CANN_VERSION_BELOW_6_3_ALPHA002
+    #include "op_proto/built-in/inc/all_ops.h" // ge::Conv2D, ...
+#else
+    #include "built-in/op_proto/inc/all_ops.h" // ge::Conv2D, ...
+#endif
 #include "graph/tensor.h" // ge::Shape, ge::Tensor, ge::TensorDesc
 #include "graph/types.h" // DT_FLOAT, ... ; FORMAT_NCHW, ...