The agricultural climate division index is studied and defined according to the relationship between Huyou production and meteorological conditions. On the basis of Zhejiang geographical data on the scale of 1∶250 000, climate data in 40 years of Changshan observatory station and establish high-level pattern of division index. Chang Shan-Huyou suitable planting area is divided to classified regions by using technology of GIS, which are optimum, suitable, less suitable or unsuitable area for Huyou planting. That provides scientific bases for the extension and development of Changshan Huyou.