White vehicle body and vehicle door assembling and positioning system device

A body-in-white vehicle door assembling and positioning system device comprises a tool body, positioning pins and a limiting block, the positioning pins comprise a main positioning pin and an auxiliary positioning pin which are used for positioning the tool body and a door frame in the X direction and the Z direction, the main positioning pin is installed on a main positioning hole of a side wall assembly, and the auxiliary positioning pin is installed in a fender installation hole in a door frame of a stamping part. Main positioning pins in the X direction and the Z direction of a vehicle door assembly are installed in rearview mirror installation holes in a vehicle door outer plate, an auxiliary positioning block of the vehicle door assembly is installed on the front contour line of a vehicle door, the front end of the vehicle door assembly is attached to the positioning face of an X-direction limiting block, a fixed suction block on a tool body is connected with the Y direction of a door frame, and a movab