The invention relates to a comprehensive test system for automobile instruments. According to the comprehensive test system for the automobile instruments, a CPU (Central Processing Unit) master control module is used for carrying out global control on other eight modules, the outputs of the modules are controlled at all time according to control instructions from a man-machine interface display module, and various parameters of the system can be inputted, modified and stored. The comprehensive test system can randomly meet the requirements on the repeated endurance test and basic error test on various automobile instruments, such as odometers, tachometers, water temperature gauges, fuel gauges, oil pressure gauges, barometers, voltmeters, and various indication lamps and lighting lamps of instrument panels, and the operation is simple. During the process of system designing, the ergonomic factors are fully considered, and the error-proofing design is fused during the process of parameter input, so that the parameter input is rejected and the operation of alarming is carried out if the data input is incorrect.