The invention provides a millimeter-wave human body safety check system based on reconfigurable reflection arrays. The system comprises a plurality of feed source antennas used for emitting electromagnetic waves and receiving human body scattered echoes fed back by a plurality of reconfigurable reflection arrays; the plurality of reconfigurable reflection arrays used for receiving the electromagnetic waves and controlling the electromagnetic waves to be radiated to areas of a human body to be detected, and feeding back the human body scattered echoes to the plurality of feed source antennas; a position sensor used for obtaining position information of the human body to be detected in real time; a multichannel millimeter wave transmit-receive assembly used for generating the electromagnetic waves, transmitting the electromagnetic waves to the plurality of feed source antennas and carrying out down-conversion on the human body scattered echoes to a baseband signal; and a control device used for controlling the reconfigurable reflection arrays according to the position information to adjust radiation regions of the electromagnetic waves, and analyzing the human body scattered echo baseband signal in real time and carrying out imaging on the human body to be detected based on the baseband signal. The millimeter-wave human body safety check system has beam electric scanning capability similar to that of a phased array radar, can realize imaging detection in the people walking process and has the advantage of high pass rate.