Abstract: A water storage tank includes a water storage tank body; the water storage tank body is defined with a liquid storage chamber for storing a liquid and for receiving a water pump, and an opening communicating with the liquid storage chamber; an open groove for allowing a power line to pass through is formed in the water storage tank body; and the open groove penetrates through an end edge of the water storage tank body close to the opening. Since the power line can be led out from the liquid storage chamber by directly clamping into the open groove from top to bottom, the power line is arranged conveniently and there is no need to provide a wiring box or a wiring groove for the power line.