In order to improve the efficiency of radar system simulation, a component?based methodfor constructing signal processing module of radar simulation system is proposed in this paper. Firstly, alibrary of signal processing function components is established based on the independence of thedifferent functions of radar signal processing for the proposed method; on this basis, the required signalprocessing modules can be flexibly constructed by selecting and splicing components after analyzing thesimulated radar; finally, the effectiveness of the proposed method is demonstrated by the experimentthrough the radar componentized signal processing module constructed in Visual Studio 2013 platform.