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茂汶羌族自治县位于四川省西北部,是昔年红军长征经过的地方。境内群山环绕,峰峦重叠。岷江自北(松潘县)流入,纵横全境。沿江两岸海拔1300—1800公尺。气候冷凉乾燥,昼夜温差大。全年无霜期180—230天。年平均温度11.4℃,绝对最高31.9℃,绝对最低—13℃(1975.12)全年日照1550小时。年雨量500毫米、相对湿度70％左右,年蒸发量1317毫米。土质微碱。
Maowen Qiang Autonomous County is located in the northwest of Sichuan Province, where the Red Army passed the Long March. Surrounding mountains, overlapping peaks and ridges. Minjiang River flows from the north (Songpan County) to the whole territory. Both sides of the river are 1300-1800 meters above sea level. Cool and dry climate, large temperature difference between day and night. Frost-free period throughout the year 180-230 days. The annual average temperature of 11.4 ℃, the absolute maximum of 31.9 ℃, the absolute minimum of -13 ℃ (1975.12) 1550 hours of sunshine throughout the year. Annual rainfall of 500 mm, relative humidity of about 70%, the annual evaporation of 1317 mm. Soil alkaline.