Chassis bolt position detection method and detection device

The invention provides a chassis bolt position detection method and device, and belongs to the technical field of detection, and the method comprises the following steps: obtaining the design position of a bolt of a qualified chassis; performing multi-line light source projection on different positions of the detected chassis, and obtaining a plurality of two-dimensional images of the detected chassis in combination with the light source projection; synthesizing a three-dimensional image of the detected chassis through light source projection and a plurality of two-dimensional images; the actual position of the detected chassis bolt is obtained according to the synthesized three-dimensional image; comparing the actual position of the detected chassis bolt with the design position, judging whether the difference between the actual position and the design position is greater than a deviation threshold value, and if so, judging that the chassis is unqualified; and if not, judging that the chassis is unqualified.