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----------------------------------------------inancial early warning model， to predict the difficulties， it is necessary.
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This article is based on cash flow of the enterprise financial early warning model。 Selected the 74 a—share listed companies， 37 and 37 of ST company, ST company industry type choice of the company is manufacturing, this is because manufacturing is the core of the industry。 Establish financial early warning model, assume that the industry and scale to the research conclusion will not result in a substantial influence, selected financial data are true and correct, and then principal component analysis, selected to include more financial information index, based on the analysis of the problem in only considering the principal component analysis （pca） is not enough， because in the principal component analysis, after all， ignored when some of the information dimension reduction, the comprehensive analysis of the research object not p