Steel plate length measuring device

The utility model discloses a steel plate length measuring device, and relates to the technical field of quality inspection equipment. The device comprises a fixing unit used for placing a laser range finder and a reflecting unit used for reflecting signals of the laser range finder. The fixing unit comprises a first bottom plate, upward baffles are arranged at one end and on the two sides of the first bottom plate, a plurality of bolt holes are formed in the baffle on one side of the first bottom plate, and fixing bolts are installed in the bolt holes in a penetrating mode; the reflecting unit comprises a vertical reflecting plate, and a second bottom plate extending horizontally is arranged on the surface of one side of the bottom of the reflecting plate. Compared with the prior art, the steel plate length measuring device can solve the problems that when a measuring tape is used for measuring the length of a steel plate at present, a worker needs to frequently shuttle and measure in a gap between two steel