Abstract: A new variable proportion PI (proportional-integral) controller with intelligent sampling is proposed for the controlled objects with large time-delay in the process control field. It compensates the time-delay features of called procedure by intelligent sampling unit, and speeds up the adjustment process by variable proportion PI controller. Programming and simulation are carried out by RSlogix5000 and Emulate 5000 softwares. The simulation results show that the variable proportion PI controller with intelligent sampling is of slight overshoot, fast response and good anti-jamming.