Abstract: Aiming at the problem of large delay in temperature control of draw texturing machine,a method of Smith predicting control was used.The building and application of the temperature control model of draw texturing machine were discussed in detail,and its flow chart was presented.The control principle of thyratron power regulator was used in the back channel,thus,the hardware was simplified,and the power factor was raised.Comparison of Smith predictor control system and PID control system demonstrated that the former can eliminate the pure time delay,reduce overshoot,shorten regulating time,and improve control precision and running stability.It is obvious that Smith predictor control system is superior to the conventional PID and suitable for the temperature control of draw texturing machine.