传统的直进式拉丝机缺乏张力检测装置，容易出现断丝或堆丝现象。在不增加机械装置的情况下，通过检测变频器直流侧电流的方法来反映反拉力的变化，按照智能控制原理，结合现场经验设计出专家控制器。介绍稳态速度给定规则集、动态过程保持反拉力恒定规则集、故障诊断规则集及自学习环节的设计，并对系统进行仿真分析。该专家控制器可保证拉拔过程中反拉力的恒定，并可对故障实时报警。 The traditional straight wire drawing machine lack of tension detection device, prone to broken wire or pile wire phenomenon. In the condition of not increasing the mechanical device, the change of the anti-pulling force is reflected by the method of detecting the DC current of the inverter, and the expert controller is designed according to the principle of intelligent control and the field experience. This paper introduces the steady state speed set rule set, the dynamic process keeps the constant set of anti-pull rule, the fault diagnosis rule set and the design of self-learning link, and carries on the simulation analysis to the system. The expert controller can guarantee the constant anti-pull in the drawing process and can alarm the fault in real time.