The various financial activities and financial indicators of an enterprise are interrelated and mutually influencedFinancial analysts are required to systematically analyze various indicators. DuPont analysis system is to the enterpriseA comprehensive analysis of the financial situation of the industry, which links different types of indicators through some kind of relationshipTo establish a pyramid analysis system to analyze the changes of the core indicators. Thus the wholeIt reflects the financial situation of the enterprise in face, intuitively and systematically, and can greatly improve the financial statementTable the efficiency of analysis. DuPont analysis system is based on the comprehensive index "net interest rate on equity"The biggest characteristic of the system is simple and operable. It related toThe internal relationship of the index shows that through the decomposition of layers, the return on equity of this comprehensiveConcretize the reasons for the rise and fall of the index, and find out the crux of the financial problems of enterprisesIs all about.