Rotary valve ceramic plunger precision pump

The utility model relates to the technical field of mechanical pumps, and discloses a rotary valve ceramic plunger precision pump which comprises a ceramic piston cylinder, a ceramic valve head is fixedly installed at the end of the ceramic piston cylinder, a three-way ceramic rotary valve is fixedly connected to the side wall of the ceramic valve head in an inserted mode, and a base is arranged on one side of the lower portion of the ceramic piston cylinder. The base and the three-way ceramic rotary valve are jointly connected with an opening and closing mechanism, a thin air cylinder is arranged above the base, the output end of the thin air cylinder is connected with a piston column, and the piston column is located in the ceramic piston steel in a sliding mode. The stability of the filling amount and the filling speed can be effectively improved, the main body is made of ceramic, the ceramic has the advantages of high precision, high abrasion resistance, corrosion resistance and the like, the three-way ce