ABSTRACT All the current moving in the financial market would be affected by the business cycle and the price the asset, Do all the investor realize the knowledge of the financial asset, and allocate their asset rationally or emotionally, even take the advice of the sales representative¡H After reading studies of mutual fund, For the purpose of realize the determinants of money flow, we combine the experience and econometrics and the opinion of market participants to undertake this study. In this study, we investigate the determinants of mutual fund flows from aggregate viewpoint. The empirical results are as follows: 1.The initial public offering of new fund have positive influence on the aggregate flow, no evidence that aggregate mutual fund flows have been affected by the stock return. 2.The stock returns with 1 month lag show no evidence to influence the flows, 3.Long-term real interest have obviously negative influence on the aggregate mutual fund and while short-tern interest does not. 4.Personal income positively related to aggregate mutual fund flows but not obvious for 1-month lagged income.