Abstract: In order to solve the problem of incapable of simulating posture adjustment, tail-flame interference and multipath effect of slow-spinning targets by single-pulse radar angular tracking simulator, an angular tracking simulation method based on the characteristic angle description is proposed. Firstly, the basic principle of single-pulse radar angular tracking system is elaborated; the relationship between characteristic angle and posture adjustment of slow-spinning targets is analyzed, and the simulation equations between characteristic angle and gain of transponder antenna/attenuated strength of signal tail-flame are derived; then, the influence of multipath effect on angular tracking is studied, and the traditional angular tracking simulation method is corrected by compensating the deviation of the pitch angle; finally, the process of simulating single-pulse radar angular tracking is presented based on the established model. The results of simulation experiments show that the simulation circumstance is close to the real one, reaching a level simulation accuracy of less than 0.5 V and an angular tracking simulation accuracy of less than 0.1° for antenna′s main lobe width of 1.8°.