A bending resistance detection device for elevator guide rail production belongs to the technical field of elevator detection. The device comprises a body, the body is a rectangular block, a display is fixedly mounted at the rear end of the right wall of the body, the display is an existing technology and is not discussed in the prior art, a display screen is fixedly mounted on the right wall of the display, and a switch is fixedly mounted at the front end of the right wall of the body. In the present invention, extrusion grooves and stabilizing blocks are arranged, during use, an elevator guide rail to be detected is placed in two groups of fixing plates on the body, the two groups of stabilizing blocks on the fixing plates are extruded by the guide rail to drive functional springs in theextrusion grooves to deform, and the functional springs reversely extrude the elevator guide rail. As the surfaces of the stabilizing blocks incline from top to bottom to the sides, away from each other, of the two groups of stabilizing plates, the elevator guide rail is prevented from being separated from the fixing plates upwards. As the surfaces of the stabilizing plates are rough, the friction force between the stabilizing plates and the elevator guide rail is increased, the effect of stabilizing the elevator guide rail on a workbench is achieved, and the detection efficiency is improved.