Dosing device for water treatment

The utility model discloses a dosing device for water treatment, which comprises a tank body and a top cover, the top cover is provided with a liquid inlet and a plurality of dosing ports, funnels are arranged at the dosing ports, the tank body is provided with a liquid outlet, the lower part of the top cover is provided with a support plate, the support plate is provided with a feeding port, and the feeding port and the dosing ports are arranged in a staggered manner; a metering plate is arranged between the top cover and the supporting plate in a sliding mode, a metering hole is formed in the metering plate, and the metering plate can slide to enable the metering hole to only coincide with the dosing port or the feeding port. Through the sliding metering plate, the metering hole reciprocates between the chemical adding port and the feeding port, and chemicals are quantitatively conveyed into the tank body from the funnel, so that multiple chemicals are added at the same time, the chemical adding speed is in