The present invention relates to a vehicle door checking tool platform. The platform comprises a square frame, a detection platform is fixedly arranged at the upper end face of the square frame, the square frame is internally provided with a bearing support, bottom feet are arranged at a connection of the bearing support and the square frame and the lower portion of the center of the bearing support, and the upper end face of the detection platform is parallel to the lower end faces of the bottom feet. The vehicle door checking tool platform is simple in structure, and a detection platform issupported by using a square frame, so that the weight of the whole...is reduced, and a detection surface of the detection platform can be machined conveniently; and moreover, a bearing support is arranged in the square frame to effectively prevent the square frame from deforming, and bottom feet being parallel to the upper end faces detection platform are arranged at the lower end of the square frame to effectively ensure accurate detection data.