The utility model relates to a hydraulic motor with an oil distribution shaft structure. The engine comprises a shell, an oil passing disc, a crankshaft and an oil distribution shaft located in a shaft hole of the oil passing disc. wherein the oil distribution shaft is connected to one end of the crankshaft and can synchronously rotate along with the crankshaft; a sealing cover for shielding the outer port of the shaft hole is fixed on the end surface of the oil through disc; the oil distribution shaft is provided with a balance section, a first working section, a second working section and anoil distribution section; wherein the first working port is communicated with an oil way on the first working section, the second working port is communicated with an oil way on the second working section, and the oil filter is characterized in that the oil through disc and the shell are manufactured into an integrated piece, and the first working port and the second working port are located on the end face of the oil through disc. After the structure is adopted, the overall structure of the hydraulic motor can be more compact, the oil leakage phenomenon at the position in the prior art can be thoroughly eliminated, the two working oil ports are formed in the end face, pipe distribution of an external oil pipe can be facilitated, and the hydraulic motor is more convenient to install and maintain and higher in practicability.