Abstract: Based on the observation data from 104 meteorology stations during 1961-2010 and phenology data of maize from 17 agrometeorology stations during 1981-2010 in Sichuan basin, the change of climatic resources and potential productive during the maize growth period were studied by using the Agro- Ecological Zone (AEZ) model. The results showed that the thermal time ≥10℃during the maize growth period increased in western basin and southern basin, but decreased in other areas from 1961 to 2010, the trend of which was -9.5~18.7℃·d·(10a)-1. The sunshine hours decreased by -48.3～-4.3h·(10a)-1 in Sichuan basin. The precipitation decreased in most regions of Sichuan basin, but for the northeastern basin appeared increasing tendency, the trend of which was -47.9～29.3mm·(10a)-1. The photosynthetic potential productivity of maize decreased by -708～-64 kg·hm-2·(10a)-1 and photo-temperature potential productivity decreased by -404～-32kg·hm-2·(10a)-1 from 1961 to 2010 in Sichuan basin. The climatic potential productivity of maize decreased in most regions of Sichuan basin, the trend of which was -408～34kg·hm-2·(10a)-1.This research can provide important theoretical support for developing the national response strategy on climate change, and overall policy decision of maize production.