Abstract: Based on the temperature and precipitation data of 50 regional stations and operational stations from 1981 to 2015, the spatial and temporal distribution characteristics of precipitation and temperature in Chengdu plain economic zone were analyzed. The conclusions are as follows: The spatial distribution characteristics of temperature in Chengdu plain economic zone are low in the northwest and high in the southeast. Suining, Ziyang, southeast of Chengdu, east of Meishan, south of Ya 'an and northeast of Leshan are high temperature regions. Mount Emei and Longmen Mountains belong to low temperature area. The temperature of Chengdu plain economic zone showed an obvious upward trend, and the abrupt change of temperature occurred in 1996. The precipitation in Chengdu plain economic zone was high, and there were large precipitation areas in Mount Emei, western Meishan and the central region of Ya 'an, followed by the western of Chengdu and the central and western of Mianyang. The precipitation in Chengdu plain economic zone showed a significant downward trend. The monthly analysis showed that the precipitation was concentrated in the July and August, that is to say, the large rain and high heat occurred in the same period in Chengdu plain economic zone.