Combined medicine adding device

The invention discloses a combined medicine adding device which comprises a medicine adding tank base, medicine adding tanks and a sewage discharge pipeline, wherein at least two medicine adding tanks are arranged on the medicine adding tank base; the sewage discharge pipeline is communicated with or separated from each medicine adding tank; each medicine adding tank comprises a tank body, a medicine feeding opening and a water inlet in the tank body, a stirrer and a bottom valve in the tank body, and a medicine adding metering pump; each bottom valve is mounted at a liquid outlet in the bottom of the corresponding tank body; each medicine adding metering pump is fixed on the corresponding tank body; the inlet of each medicine adding metering pump is connected with the corresponding bottom valve; each medicine adding metering pump filters medical liquid through the corresponding bottom valve, and pumps the filtered medical liquid into a wastewater system needing to be treated through the sewage discharge pipeline. The combined medicine adding device has the advantages of being high in water treatment efficiency, accurate in medicine adding, high in integration degree, low in production cost, convenient to maintain, and the like.