Waste liquid storage tank

The utility model provides a novel waste liquid storage tank which comprises a tank body, and the top of the tank body is provided with a feed port, an emergency discharge valve, a breather valve and a stirrer. A drain outlet and a discharge hole are formed in the lower part of the tank body; wherein the stirrer comprises a motor, a stirring shaft and stirring blades, the stirring shaft penetrates through the top of the tank body and extends into a cavity of the tank body, and the stirring blades are located in the middle area of the tank body; a first liquid level meter and a second liquid level meter are further arranged on the side wall of the tank body, the first liquid level meter is arranged at the position close to the top of the tank body, the second liquid level meter is arranged at the position corresponding to the stirring blades, and the defects that an existing waste liquid storage tank is unstable in pressure, prone to corrosion, inaccurate in discharge amount and the like can be overcome. 本实用新型