Quantitative dosing device

The utility model discloses a quantitative dosing device which comprises a dosing barrel and a dosing pump, the bottom of the dosing barrel is fixedly connected with a liquid discharge pipe I, one end, far away from the dosing barrel, of the liquid discharge pipe I is provided with a two-way joint I, one end of the two-way joint is connected with a liquid discharge pipe II, and the other end of the two-way joint is connected with a liquid conveying pipe; one side of the dosing barrel is fixedly connected with a water inlet pipe, the other side of the dosing barrel is further fixedly connected with a steam pipe, one end of the steam pipe penetrates through the side wall of the dosing barrel and is fixedly provided with a two-way connector II, and flow dividing pipes are fixed to the two ends of the two-end connector correspondingly; the diversion pipe is arranged in the dosing barrel, the bottom of the diversion pipe is provided with a first exhaust hole, and a stirring device facilitating mixing of water and