The invention discloses a simulation method for object detection of pulse system radar in a microwave anechoic chamber. The method comprises the following steps: in a first step, an intermittent transmitting and receiving mode is used for obtaining object echo signals; in a second step, the object echo is recovered; in a third step, pulse compression is performed and object information is obtained; in a fourth step, information reconstruction is achieved via energy compensation of the object echo. The beneficial effects of the simulation method disclosed in the invention are that firstly, a received and transmitted signal coupling problem of a radar transmitting and receiving time-sharing mode in the microwave anechoic chamber and a problem of blocking of received and transmitted signals in a simultaneous transmitting and receiving mode can be solved; secondly, problem of time domain wave shape recovery of the object echo is solved; thirdly, object information can be obtained accurately; fourthly accurate object echo energy compensation and information reconstruction results can be achieved.