The utility model discloses a thrust bearing bush for an engine crankshaft and aims at providing a thrust bearing bush for engine crankshaft, and the thrust bearing bush is simple in structure, convenient to disassemble and high in reliability. The thrust bearing bush comprises a bearing bush, wherein two end surfaces of a bearing bush seat are provided with bayonets, and a left thrust bush and a right thrust bush are fixedly connected into a whole by virtue of the bayonets and gaps. The thrust bearing bush disclosed by the utility model is applicable to various engine crankshafts.