Novel anti-theft well lid

The utility model discloses a novel anti-theft well lid, and relates to the technical field of anti-theft well lids. The manhole cover comprises a fixing base, a fixing block is fixedly installed on the surface of one side of the fixing base, side plates are fixedly installed on the other three sides of the fixing base, a manhole cover body is rotatably installed in the fixing base and matched with the fixing base, a containing groove is formed in the surface of the manhole cover body, and the manhole cover body is fixedly installed in the containing groove. Two fixing mechanisms are arranged in the containing groove, each fixing mechanism comprises a movable plate and a fixed plate, the movable plates are installed in the containing groove in a sliding mode, the fixed plates are fixedly installed in the containing groove, springs are matched with the movable plates, the movable plates are pushed by the springs to slide, and therefore the movable plates drive the inserting rods to slide; according to the anti