The utility model discloses a power transmission device for an environment-friendly livestock and poultry manure transporting, applying and sprinkling vehicle, which is used for driving a manure sprinkling component of the environment-friendly livestock and poultry manure transporting, applying and sprinkling vehicle. The power transmission device is characterized in that the power transmission device comprises a traction power, a hydraulic pressure station connected with the output shaft of the traction power, a power distribution station connected with the hydraulic pressure station, and a power transmission component connected with the outlet end of the power distribution station. The rotating shaft of the manure sprinkling component is driven by the power transmission component. The power transmission device has the advantages of automatic and continuous manure sprinkling, reduction of the labor intensity of operators, improvement of operating efficiency, good cleanness and hygiene, oil consumption reduction, and energy consumption reduction.