Metro vehicle skin three-dimensional detection tool

The utility model relates to the technical field of part detection, and discloses a metro vehicle skin three-dimensional detection tool, which comprises a bottom frame and a wedge-shaped filler gauge, an insert main body is movably installed on the outer wall of the top of the bottom frame, a detection frame A is movably inserted in the insert main body, and a detection frame B is movably installed on the outer wall of the insert main body. According to the three-dimensional detection tool for the skin of the metro vehicle, the insert main body is detected by arranging the underframe, the insert main body can support and fit the skin of the metro vehicle, a wedge-shaped filler gauge can be inserted among the detection frame A, the detection frame B and the insert main body, and then gaps among the detection frame A, the detection frame B and the insert main body are measured; the tool is clear in structure and convenient to operate, the workpiece is positioned in multiple directions, the reversible deformatio