Abstract: In the designing of superplastic micro-extrusion device，this paper applied a PI Smith predictor to the temperature control system for its time-delay characteristic.Based on the rapid prototyping instruction，the model identification control strategy of temperature parameter was realized in the MATLAB/Simulink environment.The temperature control system was composed of industrial control computer and data acquisition card PCI-1710.The power out was controlled by PWM method.The result of temperature control in experiment shows that the control precision is in the range of ±0.5℃，it can satisfy the design target.