中文摘要：

有效的策略获取是决策科学研究的重要内容，可拓策略生成方法作为解决矛盾问题的重要方法，是可拓工程研究的重点之一．随着信息技术的发展，从数据中通过挖掘获取策略成为一条新的路径．在分析现有分类方法的基础上，提出了一种基于决策树分类规则的可拓策略获取方法，该方法利用可拓集合和可拓变换理论，对决策树规则进行二次挖掘和可拓变换，从中获取“不行变行，不是变是”的策略，为制定预防客户流失的转化措施提供有针对性的决策参考．实践证明，该方法可操作性强，对其它的可拓策略获取方法的研究也具有参考价值．

英文摘要：

Strategy generation is the key factor for scientific decision-making; extension strategy generation is an important method of settling conflicts in extension engineering. While analyzing the decision tree classification, it presents an acquisition method of extension strategy. It re-mines and transforms the decision tree rules from ＂can＇t to can, not to yes＂ strategy, based on the extension set and extension transformation theory. The strategy applies simple and intuitive decision-making to the retention of the customer. Its application in a web company has proved that this method is highly feasible, and also has the reference value for the research on other methods based on extension.