In order to improve the control accuracy and response speed of the temperature control system of the herbal medicine roaster, an improved fuzzy sliding mode control method is proposed. The improvements include the design of sliding mode surface and reaching law. A sliding mode surface with exponential function is designed. When the error is large, the control heating system maintains the maximum power output and shortens the system adjustment time; In order to suppress the chattering phenomenon caused by fixed switching gain, an exponential reaching law with switching gain of power exponential function is designed. The weight of power exponential function is adjusted by fuzzy controller. When the system error is small, the chattering is effectively suppressed by using the advantage of rapid attenuation of power function. MABLAB/simulation results show that compared with the traditional fuzzy sliding mode control, the regulation time of this control strategy is reduced by 54.94%; It has obvious inhibitory effect on buffeting. The engineering application results show that when the herbal medicine roaster with this control method works stably, the temperature fluctuation range is±2.12℃, which meets the requirements of traditional Chinese medicine frying process.