The overall program of the portable multimedia player is proposed based on the Intel PXA27x microprocessor, and the hardware platform and the software cross-development environment of the system is buit up. The Cygwin running on Windows is chosen as Linux simulation environment, and the Mplayer as the transplant goal of the embedded system. With the Crosstool as cross-compilation tool the audio and video playback of the Mplayer is realized in the embedded system completely.