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The sliding mode control of continuous stirred reactor system(CSTR) is studied. The model of the system can be described by the Takagi-Sugeno(T-S) fuzzy bilinear model. Based on the fuzzy bilinear model, the sliding mode control method is given. The linear sliding mode surface is improved on the previous research results of scholars, and the integral sliding mode surface is constructed. The equivalent control quantity and switching control quantity designed by this method can ensure the control accuracy of the system. By studying its stability, the sufficient conditions of global stability are obtained, and the controller parameters of the sliding surface are obtained. At the same time, seven fuzzy rules are constructed, and fuzzy inference is made to the switching gain term by using fuzzy method, so that the overall control is smoothed, and chattering phenomenon is avoided in the system state, so that the actual operation is realized. Finally, the simulation results of continuous stirred reactor demonstrate the effectiveness of the control method.