Safety early warning device of elevator

The utility model provides a safety early warning device of an elevator, and belongs to the technical field of safety early warning of elevators. Comprising an elevator door, an opening is formed in the outer wall of one side of the elevator door, the inner walls of the two sides of the elevator door are rotationally connected with the same screw rod, the outer wall of the screw rod is in threaded connection with a moving block, the moving block is slidably connected to the inner wall of the elevator door, a round opening is formed in the outer wall of one side of the moving block, and a protective sleeve is fixedly connected to the inner wall of the round opening; an infrared sensor is slidably connected to the inner wall of the protective sleeve, a mounting groove is formed in the inner wall of the bottom of the moving block, two sliding rods are fixedly connected to the inner wall of the mounting groove, springs are connected to the outer walls of the two sliding rods in a sleeving mode, and the same mount