Medicament adding system and use method thereof

The invention relates to the field of cold rolling wastewater treatment, in particular to an agent adding system and a using method thereof. The system comprises a first-stage neutralizing tank, a second-stage neutralizing tank, a pH value detection device, an agent adding device and a timing module, the pH value detection device is used for detecting the pH value of wastewater in the first-stage neutralizing tank and the second-stage neutralizing tank and inputting data into the timing module, the timing module adjusts the opening and closing conditions of the agent adding device, and the agent adding device is connected with the first-stage neutralizing tank and the second-stage neutralizing tank. Through the cooperation of the devices, the automation of medicament feeding is realized, the manpower waste is reduced, and the condition of inaccurate medicament feeding caused by the hysteresis of pH value detection is prevented, so that the pH value of the cold-rolling wastewater in the cold-rolling wastewater