This paper designs a new system of motion video tracking motion human body,and the tracking platform which is based on P89v51 is simple and stable.A fast model matching way is presented on motion object detection and tracking.In the complex motion background,it adopts the adapting Surendra background updating algorithm for capturing the background image and subtracting the target template,then decreas the model matching area by the same area of before and after frame.It is realized in video automatic tracki...