The invention discloses an intelligent guard bar mounting vehicle. The intelligent guard bar mounting vehicle comprises steering motors, first steering wheels, vehicle wheels, travelling motors, a first bottom plate, springs, sliding separating plates, clamping support plates, clamping second steering motors, steering wheels, steering guiding rails, sixth telescopic electric cylinders, third guiding rails, second sliding blocks, seventh telescopic electric cylinders, fourth guiding rails and eighth telescopic electric cylinders, a guard bar is clamped through clamping devices mounted on the steering wheels and sent to the position needing mounting, and manpower is liberated; clamping discs and the guard bar can be in normal parallel states through first motors and fifth telescopic electriccylinders according to different inclined angle adjustment of the clamping position due to the fact that the cross section of the guard bar is in a W shape; automatic nut tightening devices are further arranged, the position finding function of the nut tightening devices is achieved through tenth telescopic electric cylinders and eleventh telescopic electric cylinders, nuts with different angle degrees can be tightened through first universal electric joints, ninth telescopic electric cylinders and second universal electric joints.