Mianyang City is located in the northwest of Sichuan Basin, in the middle and upper reaches of Fujiang River. Geographical coordinates are: east longitude103 45' ~105 43', north latitude 30 42' ~ 33 03'. Qingchuan County and Jiange County in Guangyuan City in the east, and nanbu county County and Xichong County in Nanchong City in the east; Shehong County and Daying County of Suining City in the south; Luojiang County, Zhongjiang County and Mianzhu County of Deyang City in the west; The northwest borders Aba Qiang Autonomous Prefecture and Wenxian County of Gansu Province. The city covers an area of 20,249.45 square kilometers, accounting for 4.2% of the land area of Sichuan Province. The built-up area of Mianyang City covers an area of 99 square kilometers. According to the main landform types in the city, the mountainous area accounts for 6 1%, the hilly area accounts for 20.4%, and the flat dam accounts for 18.6%, with an average elevation of 700 meters.

Mianyang City is located in the subtropical humid monsoon climate zone of Sichuan Basin in the eastern monsoon region of China. The winter half year is controlled by the northerly airflow, and the climate is dry and cold with little rain; The summer half year is controlled by southerly airflow, and the climate is hot, rainy and humid. Because the potential in the city is high in the north and low in the south, the height difference is very large, and the landform changes from mountain to hill, forming a unique climate feature.