Assembly device for controlling overall flatness of metro vehicle doorway

The invention discloses an assembly device for controlling the overall flatness of a subway vehicle doorway, and relates to the technical field of control over the overall flatness of railway vehicles. The assembly device comprises two frames, two upper horizontal pull rods, two lower horizontal pull rods, two diagonal pull rods, a plurality of positioning surface pressing devices and a plurality of overturning pressing devices. The assembly device has the beneficial effects that the assembly device for controlling the overall flatness of the subway vehicle doorway can be quickly mounted and dismounted, the upper plane of the chassis boundary beam is used as a positioning reference in the height direction of the vehicle, the surface of the side wall external wall panel is used as the positioning reference in the width direction of the vehicle, and a special tool foundation does not need to be additionally manufactured on the ground; the assembling device can effectively control the overall flatness of the veh