Semitrailer box body side plate splicing tool

The utility model relates to the technical field of semitrailers, and discloses a semitrailer box body sideboard assembling tool which comprises a fixing mechanism, a pushing mechanism is arranged on one side of the fixing mechanism, the fixing mechanism comprises a fixing clamping frame and a supporting table, a set of supporting legs are arranged on the lower side of the supporting table, and the supporting legs are arranged on the fixing clamping frame. A set of reinforcing rods are arranged in the middles of the supporting legs, the fixed clamping frame comprises a positioning frame, a clamping block and a side plate body, and a positioning protruding block is arranged on the lower side of the positioning frame. The screw rod is embedded into the side face of the supporting table and then penetrates through the positioning protruding block, so that the positioning frame can be further fixed, the shaking condition is avoided, the side plate body is moved to the middle position of the clamping block through