In order to solve the shortcomings of traditional intrusive debuging methods such as single step and breakpoint,more and more processors add Trace function.Existing application of Trace mainly focus on program tuning,but there are obvious deficiencies in dynamic playback of program execution flow based on source code.This paper is based on "HunXin" digital signal processor Trace,in view of the existing Trace application shortage,implementation of a program playback system based on source code.It can not only meet the requirements of program tuning,but also better meet the requirements of program debuging.