With the sample of Chinese A-stock public companies which appear on Stock Exchange of Shanghai and Shenzhen before 1994,and by using the factor method and regression,this paper finds out and explains the equilibrium relation among sustainable growth of Chinese public companies,profitability and capability of debt-repayment and capability of operation. This paper discover: (1)The sustainable growth rate of a public company is in inverse proportion to asset-debt ratio, but in direct proportion to current debt ratio as well as acid test ration. (2)There is a positive correlation between the sustainable growth rate of a public company and its profitability. That's to say, the higher earning rate, the higher sustainable growth rate.(3)The sustainable growth rate of all public firms other than those of the commerce industry is positively correlated to the growth capacity.(4)Apart from the commerce industry, there is a positive correlation between the sustainable growth and the operation capability of the public companies, regardless of their integral sample, industries sample and scale sample.