Compact oil tank

The utility model provides a compact oil tank which comprises an oil tank body, a flow guide cavity is formed in the inner bottom of the oil tank body, an oil return cavity and a semi-arc flow guide wall are arranged in the flow guide cavity, one side, close to the semi-arc flow guide wall, of the oil return cavity is open, an elastic flow guide plate is arranged at the opening of the oil return cavity, and the elastic flow guide plate is arranged on the oil return cavity. A gap is reserved between the elastic flow guide plate and the side wall of the flow guide cavity, an exhaust hole is formed in the position, corresponding to the circle center of the semi-circular-arc-shaped flow guide wall, of the top of the flow guide cavity, and an oil discharge pipe is arranged on the side, opposite to the semi-circular-arc-shaped flow guide wall, of the flow guide cavity. An oil return filter communicated with the oil return cavity is arranged at the top of the oil tank body; air mixed in hydraulic oil can be eliminat