The invention provides a hardware detection mounting auxiliary device. The auxiliary device comprises a movable mechanism, a height adjusting mechanism, a length adjusting mechanism and a traction mechanism; the height adjusting mechanism is arranged above the movable mechanism; the length adjusting mechanism is arranged at the top end of the height adjusting mechanism, and an included angle is formed between the height adjusting mechanism and the length adjusting mechanism; and the traction mechanism is arranged on the length adjusting mechanism and used for drawing to-be-mounted hardware to move up and down. According to the hardware detection mounting auxiliary device, by adjusting the height adjusting mechanism and the length adjusting mechanism, adjustment of the position of the to-be-mounted hardware is achieved; movement of the position of the to-be-mounted hardware is achieved through the traction mechanism and the movable mechanism, and the labor of operators is reduced greatly; and meanwhile, the auxiliary device is stable in structure, the to-be-mounted hardware is prevented from falling down when moving and being mounted, so that the probability of safety accidents in the moving and mounting process is decreased greatly, and the safety of the operators are ensured.