An environment-friendly deratization system is provided with an upper cover, a main box body and a rat storage chamber. Bait boxes, a trapper and wallboard brackets are arranged in the main box body, the trapper is provided with one-piece blades, the wallboard brackets are provided with a battery, an infrared sensor and an electromagnet, the electromagnet is connected with a Z-shaped starter, the infrared sensor is connected with a controller which is installed in a gear assembly, the gear assembly is provided with a motor, a gear reducer box, an electromagnetic clutch, a clockwork spring and a clockwork spring fixing disc, a key groove rotating shaft is arranged in the clockwork spring fixing disc and provided with a large gear and a V-shaped part, the large gear is provided with a one-way anti-rotation accessory and drives a small gear installed on a main shaft, and the main shaft is also provided with a quartering rod pushing device and the one-piece blades; when the V-shaped part collides with the quartering rod pushing device to swing, a metal pushing rod pushes a seal door which is connected to the lower portion of the main box body through a door shaft.