Preventive maintenance detection device for road surface

The utility model discloses a road surface preventive maintenance detection device which comprises a first fixing support capable of being installed on the front portion or the rear portion of a vehicle, a detection support is arranged on the side, away from the vehicle, of the first fixing support, the lower portion of the detection support is rotationally connected with at least two chain wheels, and chains are meshed on the chain wheels. The detection support is fixedly connected with a first motor, the output end of the first motor is in transmission connection with at least one chain wheel, the chain is fixedly connected with a follower plate, the lower portion of the follower plate is fixedly connected with a first guide rod, and the lower portion of the detection support is slidably connected with a translation plate. The translation plate is provided with a guide groove abutting against the first guide rod. Compared with the installation position at the bottom of the vehicle, the vehicle-mounted camer