The invention relates to a crankshaft thrust structure which comprises a crankshaft gear (1), a crankshaft (2), a main shaft bushing (3), a body (4) and a driving plate (5). The crankshaft thrust structure is characterized in that the crankshaft (2), the main shaft bushing (3) and the driving plate (5) are arranged on the body (4), the crankshaft gear (1) is arranged on the crankshaft (2), the main shaft bushing (3) is arranged on the body (4), and the driving plate (5) is arranged on the body (4). The crankshaft thrust structure is simple in structure and convenient to machine, compactness of the whole structure is improved, the weight of the whole structure can be reduced, stable operation of the whole structure is ensured, and performance requirements of the whole structure are met.