The utility model discloses a protection structure of an oil pan gasket of a frameless tractor engine, the gasket is arranged between an air cylinder body and an oil pan, and the protection structurecomprises a suspension support and a reinforcing web plate. The suspension supports are arranged on the two sides of the air cylinder body, and the bottom faces of the suspension supports protrude outof the bottom face of the air cylinder body. The reinforcing webs are annularly arranged on the periphery of the top of the oil pan, and the top faces of the reinforcing webs and the bottom face of the suspension support are installed in an attached mode. A containing space is formed between the top face of the reinforcing web and the bottom face of the air cylinder body, and the gasket is arranged in the containing space. The utility model discloses a protection structure of an oil pan gasket of an engine of a frameless tractor. The functions of the gasket are restored to the sealing function of the gasket from the original sealing and bearing functions, extra loads are not borne any more, the rebound interval used by the gasket is protected, the sealing function is not prone to losing efficacy, and therefore the problem that due to the fact that the gasket of the soft oil pan is compressed to deform or crush, sealing fails, and the engine oil leakage fault occurs is solved.