Static hydraulic driving device

The invention relates to a static hydraulic driving device, comprising a shell body and a valve body arranged in the shell body, wherein a hollow cavity between the shell body and the valve body is a low-pressure oil cavity; one side part of the valve body is provided with a pump cylinder body, a variable inclined disc and a power input shaft for driving the pump cylinder body to rotate; the other side part of the valve body is provided with a motor cylinder body and an output rotating shaft for outputting a torque of the motor cylinder body; the motor cylinder body is matched with the variable inclined disc arranged on the inner wall of the shell body; a high-pressure oil outlet end of the pump cylinder body is communicated with an oil inlet end of the motor cylinder body through a high-pressure oil flow channel in the valve body so as to form a high-pressure oil cavity; an oil suction opening of the pump cylinder body and an oil discharging opening of the motor cylinder body are communicated with the low-pr