BWDSP is a 32bit static scalar digital signal processor with VLIW and SIMD features, which is designed for high performance computing. In order to meet the performance requirements of digital high-performance computing, the soul core DSP provides a rich set of complex instructions, and the compiler cannot directly use these complex instructions to improve the compilation performance. Since BWDSP has a wealth of complex type of instructions, and it has high performance demands in the radar digital signal field, the implementation is researched according to the characteristics of BWDSP features based on the traditional open-source Open64 compiler framework to achieve the complex data type and complex operations support operations, and further optimization of complex instruction is realized by identifying a specific type of complex operation of a series of patterns. The experimental results show that the implementation on BWDSP compiler can achieve 5.28 time performance improvement on average.