Based on the analysis of Bijie Citys cultivated land,the rate of urbanization and the changes of regional economic growth trends,the article selected multiple-regression model to study the relationship between area of cultivated land and investment of fixed assets,industrial out put and urbanization.The results showed that cultivated area had been reduced from 4.02×10⁵hm ^{2in 1988 to 3.65×105 hm2 in 2008 with annual average decline rate 0.48%,meanwhile,percapita arable land also reduced from 0.069hm2in 1988 to 0.047 hm2in 2008 with the annual average decline rate 1.90%.Fixed asset investment,industrial development and urbanizat ion had significant impacts on the reduction of arable land,and their elasticity coefficients were-0.030,-0.002,-0.046,respectively,among which population urbanization exerted the greatest influence.During the past 20 years,the development of urbanization had led to non-agricult uralization of farm land at the expense of the arable land resource.Theref ore,the level of the intensive and economical use of urban land needs to be improved.}