The utility model discloses a shape measuring device for a specular reflection surface, and relates to the field of optical devices for measuring the shape of an object. The device comprises a computer, a material plate, a camera, a lens, a data analyzer, a detection device, a power supply device, a communication module, a light source, a printer and a mobile device, the computer is arranged at the left lower part of the material plate; the camera is arranged at the right lower part of the material plate; the lens is arranged at the upper left part of the camera; wherein the light source is arranged on the left side of the computer, the printer is arranged behind the computer, the camera, the data analyzer, the power supply device and the communication module are electrically connected with the computer, the computer is electrically connected with the printer, moving devices are arranged at the two ends of the material plate respectively, and the material plate moves freely through themoving devices. The beneficial effects of the utility model are that the shape of each mirror reflection surface and the flatness of the material plate can be accurately measured, the device is simple, the whole device is comprehensive and accurate, the measurement time is short, the real-time performance is high, and the printing is convenient.