Road flatness detection device

The utility model discloses a road flatness detection device, belongs to the technical field of road flatness detection, and aims to solve the problems that a cross rod and a road surface flatness tester are generally and directly fixedly mounted, workers are promoted to manually slide and measure the cross rod and the road surface step by step, and the work efficiency is improved. The road cross bar measuring device comprises a vehicle body, and a bottom plate is arranged at the top end of the vehicle body; the concave block, the transverse rod, the connecting plate, the sliding block and the sliding groove are installed and matched with one another, so that the transverse rod is stably connected at one end of the concave block in a sliding mode, a worker can conveniently and rapidly adjust the length size of the transverse rod, and therefore better flatness measurement can be conducted on different road widths, and the working efficiency is improved. Through mutual installation and cooperation of a pore pla