The paper studies the macroeconomic fluctuations and the monetary policy in china． The results show that: the DSGE model with three stickiness regimes can better fit and explain economic characteristics than the DSGE model with one stickiness regime in China; three stickiness regimes enterprises account for54. 01% ，43． 63% ，and 2． 36% of all the enterprises in China respectively; it is significantly different with the variation of economic variables explained by exogenous shocks in different stickiness regimes，so do im-pulse responses and dynamic adjustment paths of economic variables． The effectiveness of monetary policy can be improved if monetary policy could make systemic responses to inflation of different stickiness regime indus-tries in China．