Under the work-mode of independent search, the radar will scan its surrounding space without any indication, and then process the echo signal, aimed to find targets in the space.A large amount of data will exist in the mode, and then pose great challenges for real-time signal process of radar.A new kind of algorithm for independent search is established in the paper, the algorithm is completed in FT-6678N Digital Signal Processor (DSP) with multiple cores, it distributes input data to different cores according to the distance, and then each core processes data independently, finally one core was chosen to integrate all the detect results and output the final result.The algorithm can improve the efficiency and accuracy of signal processing in independent search.The effectiveness of algorithm is validated by simulation, and then apply current algorithm to one radar, the radar independently search a high-speed drone, the result conforms the regular of drone movement and expected design.