Abstract: Based on customized detecting and tracking processor with DSP, corresponding target detecting and tracking algorithm are studied. Considering the strong mathematics calculating capability of DSP, we studied the radar target detecting algorithm based on position correlating, and the multiple target tracking technology according to radar targets moving correlating characteristics and we implemented the corresponding detecting and tracking algorithm on DSP. The simulating result demonstrated that the detecting algorithm obtained a high performance and that the tracking algorithm was able to track multiple targets while radar scanning.