Radar performance parameter test is the important means for testing CINRAD performance indicators, the pulse power of signals and the pulse envelope in the transmitter will affects the normal work of the radar directly. To resolve the problem of complex operation, low efficiency, and high error rate of manual testing, a special CINRAD transmitter auto testing system based on LabVIEW is devised. Based on the analysis of mathematical models of S band CINRAD transmitter and the existed test methods, this paper tries to design a system to test radar transmitters by LabVIEW and remote controlling hardware test circuit. This system, in the premise of guarantee the accuracy, is a system with the characteristics of friendly interface, easy operation, and good expansibility, can provide reference and help for CINRADs parameter test and signal analysis.