The radar life detector adopts a low-frequency ultra-wideband MIMO architecture with strong penetration ability. It can penetrate non-magnetic media, such as brick-concrete walls, prefabricated slabs, coal and rock masses, etc., to detect the micro-movement vital signs of the human body buried inside. It adopts a design with large bandwidth, long baseline and high resolution, ensuring more accurate positioning. The error in distance is no more than 0.3m, and the error in orientation is no more than 0.5m.