10min内完成。Based on the extended application of AutoCAD software, a new computer model was developed for analyzing the pipe network hydraulic characteristics in drip irrigation system. Through analyzing the pipe network validity and hydraulics analytical theory of forward step method, the network graphics were effective coupled with the hydraulic calculation. Using this model, the hydraulic calculation results could feedback to the network graphics in real-time, and achieve a reasonable optimization design of pipe network. A typical application example of the model for drip irrigation was presented; the results showed that the calculated deviation of head and flow rate were reasonable; the identification of the pipe network validity and hydraulic calculation process could be completed within 10min.