文章概述了数据挖掘技术及决策树算法,并对决策树算法在高速公路联网收费网络故障诊断系统中的应用进行了初步分析和研究。利用数据挖掘技术进行高速公路联网收费网络故障智能诊断,使得网络故障诊断速度快,提高故障诊断率,改进传统网络管理软件的不足,是网络管理技术完善的方向。 This paper summarizes the data mining technology and decision tree algorithm, and makes a preliminary analysis and research on the application of decision tree algorithm in toll network fault diagnosis system of expressway network. Using data mining technology to diagnose toll network fault of expressway network intelligently makes the fault diagnosis speed of the network fast, improving the fault diagnosis rate and improving the deficiency of traditional network management software are the perfect direction of network management technology.