Abstract: A software package for missile steering system computer aidedtest using IBM-PC/XT micro-computer as core instrument is presented The software package includes 6 files.They are switch setting, zero checking,transducer calibretion,static state test,dynamic state test and data processing.The program files are written in FORTRAN Y7 merged in macro assembly language. It uses batch processing to connect the program files and the data transfer among the program files is realized by data files, so it is easy to program, debug and augment. The test system is able to generate test signals, set the switches automatically. The software package uses Chinese character menu and Chinese character interactive way and has simple error detection ability. So it is easy to use by Chinese operators. The software package has passed on line test with satisfactory result.