只需要在项目工程文件pro中添加上：
INCLUDEPATH += G:/opencv/build/include \
G:/opencv/build/include/opencv \
G:/opencv/build/include/opencv2
LIBS+= G:\opencv\build\x86\vc12\lib\opencv_ts300.lib \
G:\opencv\build\x86\vc12\lib\opencv_ts300d.lib \
G:\opencv\build\x86\vc12\lib\opencv_world300.lib \
G:\opencv\build\x86\vc12\lib\opencv_world300d.lib
修改为自己的opencv路径即可。