The　thesis　obtains　the　data　with　the　help　of　Kinect,　combined　with　the　platform　of　unity3D　to　research　3D　virtual　fitting.　Using　the　stroke　and　a　matching　algorithm　of　hidden　Markov　chain　model　to　establish　the　corresponding　relationship　between　contour　of　the　human　body　and　the　human　body　model.　It　is　based　on　multimedia　devices　to　access　and　the　unity　of　the　human　body　skeleton　control　method　to　realize　real-time　fitting.　Combined　with　Kinect　method,　3D　virtual　character　models　deformation　and　skeletal　binding　methods　to　achieve　a　breakthrough　in　the　traditional　Unity3D,　interact　naturally　through　simple　body　movements,　can　be　well　applied　to　the　virtual　fitting　system.