Final transmission structure and bulldozer

The utility model relates to a final transmission structure and a bulldozer. The final transmission structure comprises a supporting frame, a shell, pin shafts, a gear set and a half shaft which are installed at the rear end of a trolley, wherein the shell comprises an upper shell body and a lower shell body, the rear end of the upper shell body is installed on the middle of the supporting frame through the pin shafts, the lower shell body is installed on the lower portion of the upper shell body through the pin shafts, the gear set is arranged in the upper shell body, the gear set comprises a first-stage gear and a second-stage gear, the first-stage gear and the second-stage gear are meshed with each other, the first-stage gear is connected with a power source, and the second-stage gear is installed on the half shaft. The final transmission structure and the bulldozer have the advantages that the shell of final transmission is of a split type structure, and the maintenance and the casting are facilitated; through the direct connection between the shell and the trolley, components for connecting the final transmission with the trolley are omitted, and the materials are saved; the half shaft serves only as the support of the gear transmission, the stress state of the half shaft is changed, and the service lives of the gears and bearings are prolonged; the second-stage gear is of an integrated structure, not only is the strength improved, but also the materials are saved.