Abstract: In order to avoid the effects of the temperature rise of the tobacco feeding airflow in the fluidized bed in filter cigarette maker ZJ119 on the sensory quality of cigarettes, a temperature control system was designed. The system consists of an internal water circulation system and a PLC control system, it cools the airflow by means of a water-air heat exchanger. The PID is used to regulate the flow rate of cold water and prevent condensation from forming. The control system was tested on cigarette brand "Liqun (Louwailou)" in Ningbo Cigarette Factory. The results showed that: 1) The temperature of the tobacco feeding airflow in the fluidized bed decreased from 43.67 ℃ to 36.6 ℃. 2) When the airflow temperature was set at ≥ 36.6 ℃, the control system could effectively regulate the airflow temperature. 3) The sensory quality of the produced cigarettes was significantly promoted as the airflow temperature lowered. 4) No condensation was formed on the surface of the heat exchanger or pipeline in the temperature control system. This technology supports the promotion of cigarette quality.