Sound source location has a wide application in the military, industrial noise location and other areas;the beam-forming based on microphone array is the main method for sound source localization.MVDR algorithm has a greater advantage compared to conventional beam forming algorithms,however,MVDR algorithm has a large amount of calculation and general processor can not meet the real time requirement.Considering the characteristics of huge data and complex operations in the procession of beam forming,the fixed point DSP chip TMS320DM642 produced by TI Company is selected.Mixed by C and Assembly Language, the application of uniform circular array of eight microphones on TMS320DM642 DSP based MVDR algorithm can be realized. The processing speed is much faster than on the Advanced RISC Machines(ARM),with the features of high speed,high precision and strong practicability.