Subway vehicle coaming prefabrication reversible deformation profiling tool

The utility model discloses a prefabrication reversible deformation profiling tool for a metro vehicle coaming. The prefabrication reversible deformation profiling tool comprises an upper pressing die and a lower pressing die, the upper pressing die and the lower pressing die are arranged, after the upper pressing die is fixedly assembled with an upper plate and a lower plate of a hydraulic cylinder through a connecting plate at the top, the lower pressing die on a hydraulic machine workbench is calibrated through an adjusting mechanism, and in order to improve the calibration accuracy, a laser transmitter and a laser receiver are arranged on the two sides of the upper pressing die and the two sides of the lower pressing die correspondingly; when the laser receiver on one side of the lower pressing die receives laser emitted by the laser emitter on one side of the upper pressing die, the corresponding indicator lamp I on the outer side of the lower pressing die is turned on, and then the laser emitter and the