Safety device of elevator protective door

The utility model discloses a safety device of an elevator protective door, and relates to the technical field of elevator protective doors. The door comprises a door frame, protective door plates are hinged to the inner surfaces of the two sides of the door frame, one end of one protective door plate is fixedly connected with a fixing block, the top end of the fixing block is fixedly connected with a stabilizing assembly, and one end of the other protective door plate is fixedly connected with an inserting device. The insertion device comprises a fixed rod, a cavity and a movable cavity are formed in the fixed rod, a rotary knob is arranged on one side of the top end of the fixed rod in a penetrating mode, the lower end of the rotary knob extends into the cavity and is fixedly connected with a first bevel gear, and one end of the first bevel gear is connected with a second bevel gear in an engaged mode. Under the action of the inserting device, the fixing block and the stabilizing assembly, the whole elevato