Abstract: A study on the division of geographical producting area of populus bolleana was made through a series of investigations,including investigations on meteorological records of the past years,river system,altitude,chemical and physical properties of 306 soil profiles,average growth height of trees in 390 experimental plots etc.Among them,data of 11 factors were selected for analysis,they were: altitude,average annual temperature,average annual accumulated temperature ≥10℃,average annual rainfall and evaporation,amount of organic matter in soil,total salt,total N,total P,soil bulk density and average height of trees of 14-year-old,which were planted along both sides of the roads in 1-3 lines.These data were put to computation and calculated by fuzzy cluster method.The planting area of P.bolleana in Kashen District was divided into 4(Ⅰ,Ⅱ,Ⅲ and Ⅳ) geographical producting areas,among which the first two are the most productive ones.The result of the study will help develop the forestry in the District.