Abstract: The seasonal adjustment method and filtering method were used to analyze the seasonal, irregular, long-term trend and cyclical factors of retail vegetable prices in Chongqing and the whole country and their contribution rates to the overall price fluctuation, in order to find the rule and difference of price fluctuation.The results showed that the retail price of vegetables in Chongqing was higher than the national level, the long-term rising trend was more obvious than the national level, and the fluctuation of irregular factors was more severe.The retail prices of vegetables in China and Chongqing showed the characteristics of ‘V’ and irregular ‘W’,respectively.The fluctuation of vegetable retail price at the national level mainly lay in seasonal variation, while in Chongqing it mainly lay in irregular and seasonal variation.It was suggested to stabilize the retail price of vegetables in Chongqing from the aspects of improving the monitoring and early warning system, strengthening the work of ‘vegetable basket’ in the city and strengthening the ability of vegetable industry to supply, resist risks and reduce costs.