Pressure water supply device

The utility model discloses a pressure water supply device which is characterized in that a water storage tank is a sealed tank body, the lower surface of the water storage tank is provided with a water inlet and a water outlet for realizing water inlet and water outlet respectively, water in an external water supply pipe flows into the water storage tank through a water inlet channel and the water inlet, and the water in the water storage tank flows to a water requiring pipe through the water outlet and a water outlet channel; the water inlet and the water outlet are formed in the lower surface of the water storage tank, so that all water can flow out of the water storage tank, and the emptying rate of the water storage tank is improved; when water needs to be drained outwards, the three-way valve enables the air pump to be communicated with the water storage tank, the water storage tank is inflated, the air pressure of the upper space of the water storage tank is increased, and water is drained outwards in