The invention provides a detection method for time synchronization equipment based on output signal simulation of a satellite time service module. The detection method is characterized by examining stability and correctness of time service signals output by the time synchronization equipment when multiple time synchronization signals are input to the time synchronization equipment and a simulationsignal is used as a main selection source by simulating output signal characteristics of the satellite time service module in the state of normal and abnormal satellite signals. According to the detection method of the invention, a section moment of a standard time synchronization signal and time information thereof are used as reference, ways of controlling pulse signal time-frequency characteristics and simulating navigation message signals and information thereof are adopted, synchronous and asynchronous characteristics of a simulation time service signal relative to the standard time synchronization signal are controlled to simulate signal output of the satellite time service module in the state of normal and abnormal satellite signals, so as to detect the capacity of the detected time synchronization equipment for ensuring output stability and correctness of the time service signal when the detected time synchronization equipment accesses multiple time synchronization signals anduses the simulation signal as the main selection signal. In comparison with a simulation detection method adopting satellite signal forwarding and delay control, the detection method of the inventioncan quantitatively evaluate a prevention and control capacity of the time synchronization equipment for resisting satellite signal radio frequency interference and pseudo satellite time service cheatin an easier way.