Uses principal component analysis (PCA) and cluster analysis to evaluate and classify the profitability of listed companies in Changsha-Zhuzhou-Xiangtan area in Hunan province. Firstly，sets up the evaluating indicator system of the listed companies，then uses principal component analysis to analyze seven quantize pointers，extracts two principal components to substitute the former evaluating indicators，makes clustering on the profitability，divides the profitability of the listed companies into three levels，and provides scientific basis for the decision maker.