This paper studies the influence of spatial correlation on cultivated land preservation decision by using the method of spatial econometrics analysis. The result shows that variables like parcel use,soil quality,approximility to road and ditch and county center are spatial correlated distinctly except parcel area,and SAR model error is also significiently spatial correlated similarly. So it can be concluded that,firstly,government should seriously consider the current parcel’s use when they make out the cultivated land preservation plan because of spatial dependance among parcels.Secondly,the parcel’s use conversion is affected remarkablely by its approximability,so government can control cultivated land loss by using it.Lastly,the probobility of cultivated land conversion should be considered,which can be used to draw up the preservation programme properly.