Cargo protection device for road cargo transportation

The utility model relates to the technical field of cargo protection, in particular to a cargo protection device for road cargo transportation, which comprises a box body, gear grooves are arranged on two sides in the box body, first gears are arranged at the bottom ends in the gear grooves through rotating shafts, second gears meshed with the first gears are arranged in the gear grooves, and the second gears are meshed with the second gears through rotating shafts. And one end of the second gear is fixedly connected with the inner wall of the gear groove through a rotating shaft. The fixing block at the bottom end of one box body is clamped into the fixing groove at the top end of the other box body, and at the moment, the clamping blocks are arranged in a double-face trapezoid mode, so that the clamping blocks can move along the surfaces of the fixing blocks until the fixing blocks are clamped into the inner bottom ends of the fixing grooves, and the clamping blocks on the two sides can be synchronously cla