The adjustment of the deposit reserve ratio is one of the three traditional monetary policy tools, its effectiveness is directly related to the effects of monetary policy and is directly related to the macroeconomic regulation and control. Through selecting nearly a decade of data of the deposit reserve ratio and the associated monetary indicators and economic indicators, the establishment of the economic models between deposit reserve ratio and monetary indicators and of the economic models between RRR and economic indicators, was in order to trying explain the effectiveness of the the deposit reserve ratio adjustment, and by using the linear model to give some recommendations to monetary policy.