Abstract: With the development of science and technology, multicore processorsis gradually replacing the traditional single-core processors with its advantages of high performance, low power consumption and is becoming mainstream. How to build a reliable and efficient debugging environment for multicore platform has become one of the problems we face. In this paper, we proposed a method of constructing the debugging environment for the multicore DSP platform based on porting GDB. The method can meet a variety of mainstream debugging requirements, and has a simple, high reliability advantages achieved.