The invention relates to the technical field of impact tests, in particular to a waveform generator for stopping an impact test. The waveform generator for stopping the impact test comprises a housing, an elastic piece and a guide rod, the inside of the housing is hollow, one end of the guide rod is arranged inside the housing in an inserted mode, the other end of the guide rod is exposed outside the housing, and the guide rod is used for impacting a product to be tested; the elastic piece is arranged inside the housing in the length direction of the guide rod, and is connected between the end, arranged inside the housing in an inserted mode, of the housing and the inner wall of the housing. When the waveform generator for stopping the impact test is in use, the housing is fixedly installed, the impact occurs between the product to be tested and the guide rod with a certain speed and acceleration, after the guide rod is impacted, the elastic piece transfers inverted elasticity to the product to be tested through the guide rod, by testing the waveform formed by the product to be tested, the natural vibration frequency of the elastic piece is bigger than the frequency of a sinusoidal wave set for stopping the impact test, it can be guaranteed that the obtained impact waveform is better in smoothness, and the accuracy of the test result is improved.