The invention discloses an automotive body pose parameter detection system based on LED arrays and aims to solve the problem about non-contact visual detection of automotive body pose parameters. The automotive body pose parameter detection system based on the LED arrays mainly comprises cameras (1), angular point magnetic blocks (2), edge magnetic blocks (3), a middle magnetic block (4), LED lamps (5) and steel wires (6), wherein three-dimensional coordinates of feature points are calculated according to images, collected by the cameras (1), of the LED lamps (5) in multiple positions, so that six pose parameters of an automotive body are determined, and the detection of the automotive body pose parameters is completed. The automotive body pose parameter detection system based on the LED arrays is simple in structure, high in detection precision, simple and convenient to operate, easy to mount, lower in cost and reliable in performance.