A portable oil suction device including a solid oil tank, a top cover securely fixed to the top open end of the oil tank and having a unitary handle for carrying by hand, a pump cylinder disposed inside the oil tank, a plunger moved in the pump cylinder to induce a suction force for drawing engine oil from an engine into the oil tank, and a control valve carried on a link on the bottom side of the top cover and controlled by a float to stop the air passage on the cover when the engine oil in the oil ,tank reaches the high oil level.