Abstract: In view of problem of low control precision of existing control method of brine flow and temperature in frozen station, a fuzzy decoupling control method of brine flow and temperature was proposed. Firstly, fuzzy control method was carried out on fuzzy control of flow and temperature according to different control accuracy of the brine flow and temperature. Then the decoupling control method was used for decoupling control of output flow and temperature through analysis and research of the coupling relationship between brine flow and temperature. The simulation results show that the control method can realize decoupling control of brine flow and temperature, and has high control precision without accurate mathematical model of brine flow and temperature.