The invention relates to an agitation vat liquid level metering device, which belongs to the field of mining mechanical equipment. The device comprises an agitation vat, wherein the top of the agitation vat is provided with an opening; the opening is provided with a barrel-shaped container body; the bottom and the top of the barrel-shaped container body are independently provided with a lower opening and an upper opening; the lower opening is provided with a flange and is connected with an opening on the top of the agitation vat through the flange; and the upper opening is provided with a radar liquidometer. The device has the advantages of being reasonable in design, low in cost and high in practicality, can monitor a liquid level in the agitation vat in real time, is convenient in regulating the liquid level, improves a slurry agitation effect and can improve liquid level metering accuracy.