The invention discloses a quick pass-type millimeter wave body searching system and a quick pass-type millimeter wave body searching method. The quick pass-type millimeter wave body searching system comprises a plurality of active millimeter wave detection devices, a plurality of infrared detection devices, a security check channel and a control system, wherein the active millimeter wave detection devices and the infrared detection devices are electrically connected with the control system, the active millimeter wave detection devices are evenly distributed along the security check channel from front to back, the detection directions of both the active millimeter wave detection devices and the infrared detection devices face the security check channel, and the detection ranges of all the infrared detection devices cover the whole security check channel. Compared with existing mechanical scanning type and conveyor belt type human body security check imaging systems, the quick pass-type millimeter wave body searching system has the advantages that real-time imaging is conducted when people walk through the system without stopping, so that check time is greatly shortened, working efficiency and throughput capacity can be enhanced substantially on an application scene with a high passenger flow, and feasibility and high efficiency are achieved.