Tractor oil tank mounting structure and tractor

The utility model discloses a tractor fuel tank installation structure which is used for installing a fuel tank body at the rear upper end of a tractor rear axle, the two sides of the rear end of the tractor rear axle are respectively provided with an installation plate protruding upwards in the front-back direction, and the two sides of the fuel tank body are supported at the upper ends of the two installation plates. The middle of the oil tank body extends downwards and extends into the position between the two mounting plates, and limiting pieces for limiting the oil tank body in the front-back direction and the vertical direction are arranged on the positions, located on the front side and the rear side of the oil tank body, between the two mounting plates. The limiting piece and the two mounting plates are used for jointly limiting the oil tank body at the rear upper end of the rear axle of the tractor, so that the two sides of the upper end of the oil tank are supported at the upper ends of the mounting