Provided is a pulse system radar target echo information reconstruction method in a microwave chamber. According to the technical scheme, the method comprises the following steps of radar pulse signal receiving and sending based on intermittent receiving and sending, wherein by means of the intermittent receiving and sending method, no-coupling and no-shielding receiving and sending of a radar pulse signal are achieved through alternative working of a sending channel and a receiving channel, and at this moment, the radar pulse signal receiving and sending process is actually equivalent to the situation of multiplying a square-wave signal p(t) by a radar sending pulse signal s0(t), that is to say, the equivalent radar pulse signal subjected to intermittent receiving and sending can be represented as s1(t)=s0(t).p(t); target echo information obtaining, wherein a radar target time domain impact-response function is supposed to be sigma(t), and after intermittent receiving and sending are conducted, the target echo information can be equivalently represented as s2(t)=sigma(t)*s1(t); target information reconstruction, wherein pulse compression is conducted on the target echo signal s2(t), the target information sh(t) subjected to intermittent receiving and sending is obtained, and accurate reconstruction is conducted on original target information by matching filtering with a time domain windowing signal processing means.