Abstract: A liquid lifting assembly for sucking liquid to a higher place, comprises a suction portion having a body, check valves, a suction head, and a pressure tank; the body being formed by a plurality of tubes; a pressure end, a suction end and a releasing end being extended from the body; the suction end and the releasing end are installed with check valves; the pressure end of the body being communicated to a pressure tank; the pressure tank being a hollow tank with air therein; a first check valve being installed between the releasing end and the body; the suction end being connected to a suction head through a second check valve. In use, the suction device sucks the liquid to the body; and the liquid in the pressure tank will give a pressure to push the liquid to flow through the check valve to the releasing end.