The invention discloses a fuze body object simulation method. The method specifically comprises: performing sampling on radar emission signals, obtaining digital signals, and distributing the digital signals to a plurality of digital signal channels; in each digital signal channel, according to the speed of the scattering points and the delay amount of each digital signal channel, modulating the digital signals of the digital signal channels; performing digit-simulation conversion on the modulated digital signals for obtaining the output signals of the digital signal channels; and unifying the phases of the output signals of the plurality of the digital channels, synthesizing the output signal obtaining synthesis signals of the digital channels at an intermediate frequency vector, and according to the synthesis signals, obtaining high-frequency synthesis signals and performing space radio frequency radiation. By the method and system, the problem can be solved that a point target simulator cannot perform real simulation on a fuze object, the fuze body object can be simulated in a more real manner, the phase continuity can be maintained when the signals are delayed, the actual effects of fuze simulation are achieved, and the simulation degree and precision of a radar simulation system are improved.