Auto-oscillation type hydraulic two-channel reverse circulation power head

The utility model discloses an auto-oscillation type hydraulic two-channel reverse circulation power head. The auto-oscillation type hydraulic two-channel reverse circulation power head comprises a power head shell, a reduction box body, a hydraulic motor, a power head connecting lever, a roller train and a power head central pipe. The power input ends of the power head shell and the reduction box body are connected with the hydraulic motor, the power output ends of the power head shell and the reduction box body are connected with the power head central pipe, and sand discharge pipes communicated with the power head central pipe are fixed at the upper ends of the power head shell and the reduction box body. A central pipe inner container is sleeved in the power head central pipe, and the power head central pipe is connected with a double-wall drilling tool arranged below. A gas-liquid input box body is arranged around the periphery of the power head central pipe and on the lower end faces of the power head s