Aiming at the shortage of the interface function for video adjustment in DirectDraw, used multimedia enhance instruction set (MMX) to realize video adjustment interface. Based on the general DirectDraw workflows, double buffer principle and realization of video display in DirectDraw, analyze the principle of DirectDraw player. Introduce the workflow of MMX and make an experimental analysis. The experiments results prove the method has high efficiency and high speed, and the video is easy and smooth.