本文讨论了故障严重程度识别中的特征评价和特征选择算法。将严重程度识别问题中的特征分为非单调特征和单调特征，分别设计了不同的特征评价指标和特征选择算法，为故障严重程度识别提供了可行的方案。-This article discusses the failure to identify the severity of the feature in the comments and feature selection algorithms. The severity of the problem of identifying characteristics into non-monotonic characteristic features and monotonous, were designed different　uation features and feature selection algorithm for failure to identify the severity provides a viable solution.