Based on separating seasonal factor of vegetable price,this paper first analyzes the long and stable co-integration relationship between vegetable price and currency supply,then this paper proves that currency supply is the Granger reason of vegetable price.Therefore,this paper uses revised linear regression and time-varying parameter models to analyze the static and dynamic impact of currency supply on vegetable price.The result shows that vegetable price demonstrates the obvious rising trend and feature of seasonal volatility.When currency supply increases by one thousand billion yuan,the vegetable price will increase by 41.69% on average.Time-varying parameter model shows that the impact of currency on vegetable price is dynamic and it is between 20% and 45%.It is expected that vegetable price will continue to go up if currency supply continues to increase in the future.