Abstract: DP of China in 1981-1999, analyses these data with statistical method , and sets up a regression model between the two factors and also the effects of some factors upon the economic cycle , which are the growth rate of investment in stateowned fixed assets , the growth rate of investment in non-state-owned fixed assets and the growth rate of total investment in fixed assets.

Key words: growthrateoftotalinvestmentinfixedassets, growthrateofGDP, investmentinstate-ownedfixedassets, investmentinnon-state-ownedfixedassets