Liquid changing device for preparing chemical reagent additive

The utility model discloses a liquid changing device for preparing chemical reagent auxiliaries in the field of reagent tests, which comprises a base, a pump seat, a cross beam and a bottle hole are arranged above the base, a flow type intelligent peristaltic pump capable of linearly sliding in a reciprocating manner is arranged on the pump seat, a fastening hole and a via hole are arranged on the cross beam, a reagent bottle is inserted into the bottle hole, and the fastening hole and the via hole are communicated with each other. A bottle plug is arranged at a bottle opening of the reagent bottle. By arranging the flow type intelligent peristaltic pump capable of sliding in a dovetail mode and the multiple sets of hoses, reagent pollution can be completely eradicated while rapid and accurate liquid changing is achieved, absolute isolation sealing in a daily state can be achieved by pressing the sealing opening through the hose opening fastening screws, liquid volatilization is prevented, and the liquid chan