Abstract: In view of the problem that the antiaircraft gun TV tracking system can not assess the intercept probability of ultra-low-altitude targets by the actual assembling method, the factors affecting the intercept probability were analyzed, such as the ground image and the target were simultaneously in the field of view of the photoelectric system and affected the image processing of the photoelectric system. By constructing the software and hardware environment, a simulation test method based on the three-dimensional virtual test field was proposed. The typical test case was constructed and used in the test of the antiaircraft gun TV tracking system. Firstly, the video was captured by the simulation system, and then the image was input into the video tracker for processing. By observing whether the tracking state was stable in the output video or not, it was qualitatively or quantitatively determined whether the target could be intercepted. This method was applied to the test of a certain wheeled missile-gun combined with air defense weapon system, and the validity of the method was verified.