diff --git a/fastcarto/dump-fastdb/CMakeLists.txt b/fastcarto/dump-fastdb/CMakeLists.txt
index 5b1e038..fe0c301 100644
--- a/fastcarto/dump-fastdb/CMakeLists.txt
+++ b/fastcarto/dump-fastdb/CMakeLists.txt
@@ -2,8 +2,13 @@ project(dump-fastdb)
 set(PROJECT_NAME dump-fastdb)
 set(PROJECT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 
-set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3 -march=native -DNDEBUG")
-set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O3 -march=native -DNDEBUG")
+if(MSVC)
+    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /O2 /arch:AVX2 /DNDEBUG")
+    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} /O2 /arch:AVX2 /DNDEBUG")
+else()
+    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3 -march=native -DNDEBUG")
+    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O3 -march=native -DNDEBUG")
+endif()
 
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR})
@@ -23,4 +28,3 @@ target_link_libraries(${PROJECT_NAME} fastdb)
 
 
 
-
diff --git a/fastcarto/fastdb/include/fastdb.h b/fastcarto/fastdb/include/fastdb.h
index 6d7ca44..e162b2e 100644
--- a/fastcarto/fastdb/include/fastdb.h
+++ b/fastcarto/fastdb/include/fastdb.h
@@ -60,7 +60,7 @@ namespace wx
         u8* pdata;
     };
 
-    class MemoryStream :public WriteStream
+    class fastdb_api MemoryStream :public WriteStream
     {
     public:
         class Impl;
diff --git a/fastcarto/fastdb/src/FastVectorDb.cpp b/fastcarto/fastdb/src/FastVectorDb.cpp
index 3ebb2e5..faf3efb 100644
--- a/fastcarto/fastdb/src/FastVectorDb.cpp
+++ b/fastcarto/fastdb/src/FastVectorDb.cpp
@@ -1,16 +1,17 @@
 #include "FastVectorDb_p.h"
 #include "FastVectorDbLayer_p.h"
 #include <stdlib.h>
-#include <sys/stat.h>
 
 #ifdef _WIN32
     #include <io.h>
+    #include <sys/stat.h>
+    #include <fcntl.h>
 #else
     #include <unistd.h>
+    #include <sys/stat.h>
+    #include <fcntl.h>
 #endif
 
-#include <fcntl.h>
-
 namespace wx
 {  
     FastVectorDb::Impl::Impl(void *pdata, size_t size, fnFreeDbBuffer fnFreeBuffer, void *cookie)
@@ -128,16 +129,36 @@ printf("\nFastVectorDB:A fast vector database for local cache\n\
 Author: wenyongning@njnu.edu.cn\n");
 printf("loading [%s] ...",filename);
 #endif
-        int fd = open(filename, O_RDONLY); // 打开文件获取描述符
+#ifdef _WIN32
+        int fd = _open(filename, _O_RDONLY | _O_BINARY);
         if (fd == -1)
-        { 
+        {
+            printf("Error opening file: %s\n", strerror(errno));
+            return NULL;
+        }
+
+        struct _stat fileStat;
+        if (_fstat(fd, &fileStat) == -1)
+        {
+            printf("Error getting file status: %s\n", strerror(errno));
+            _close(fd);
+            return NULL;
+        }
+        size_t size = fileStat.st_size;
+        void* pdata = malloc(sizeof(u8)*size+64);
+        _read(fd, pdata, size);
+        _close(fd);
+#else
+        int fd = open(filename, O_RDONLY);
+        if (fd == -1)
+        {
             printf("Error opening file: %s\n", strerror(errno));
             return NULL;
         }
 
         struct stat fileStat;
         if (fstat(fd, &fileStat) == -1)
-        { // 通过描述符获取状态
+        {
             printf("Error getting file status: %s\n", strerror(errno));
             close(fd);
             return NULL;
@@ -146,6 +167,7 @@ printf("loading [%s] ...",filename);
         void* pdata = malloc(sizeof(u8)*size+64);
         read(fd,pdata,size);
         close(fd);
+#endif
         auto db = load(pdata,size,free_data_buffer,0);
         if(db)
         {
diff --git a/fastcarto/lib/gaiageo/CMakeLists.txt b/fastcarto/lib/gaiageo/CMakeLists.txt
index a47f1ca..3ee58c5 100644
--- a/fastcarto/lib/gaiageo/CMakeLists.txt
+++ b/fastcarto/lib/gaiageo/CMakeLists.txt
@@ -14,7 +14,9 @@ include_directories(${CUR_PROJ_DIR}/headers/spatialite)
 include_directories(${CUR_PROJ_DIR}/src)
 #设置生成库
 add_library(${CUR_PROJ_NAME} STATIC ${all_files})
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
+if(NOT WIN32)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
+endif()
 
 #设置链接目录
 link_directories(${BIN_DIR})
diff --git a/fastcarto/make-fastdb/CMakeLists.txt b/fastcarto/make-fastdb/CMakeLists.txt
index 0698089..f0f3850 100644
--- a/fastcarto/make-fastdb/CMakeLists.txt
+++ b/fastcarto/make-fastdb/CMakeLists.txt
@@ -2,8 +2,13 @@ project(make-fastdb)
 set(PROJECT_NAME make-fastdb)
 set(PROJECT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 
-set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3 -march=native -DNDEBUG")
-set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O3 -march=native -DNDEBUG")
+if(MSVC)
+    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /O2 /arch:AVX2 /DNDEBUG")
+    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} /O2 /arch:AVX2 /DNDEBUG")
+else()
+    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3 -march=native -DNDEBUG")
+    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O3 -march=native -DNDEBUG")
+endif()
 
 
 find_package(GDAL REQUIRED)