Abstract: [Objective] To study the effects of different doses of control fertilizer for continuous cropping obstacles on soil physical properties and the economic benefits of corn.[Method]Field test method was used in 13 years continuous cropping soil of maize seed.Using field experiment method,in order to control corn continuous cropping obstacle of Fertilizer Design 7 treatments for the gradient were: CK,0.85,1.70,2.55,3.40,4.25 and 5.10 t/hm2.no fertilizer as CK,each treatment was repeated 3 times,randomized block design.[Result]Along with the increase of continuous cropping obstacle control fertilizer from 0.85 t/hm2 to 5.10 t/hm2,compared with the control,the soil total porosity,aggregates,saturated water content were increased by 6.42;,14.63;and 17.91;,and soil bulk density decreased by 11.11;,which was a significant difference(P< 0.01);Maize plant height,stem diameter,growth rate,fresh weight and dry weight on the ground were increased by 26.06;,32.12;,26.05;,48.05;and 48.06;,respectively with significant differences(P < 0.01);Corn kernel number,kernel weight and 100 kernel weight were increased by 52.24;,46.06;and 20.70;with significant differences(P< 0.01);The corn yield was increased by 46.04;with significant difference(P < 0.01);but the increased yield of fertilizer per kilogram for continuous cropping obstacle decreased by 63.64;with the increased amount of the fertilizer.[Conclusion]When the control fertilizer application amount of continuous cropping obstacle was more than 3.40 t/hm2,the negative value in profit of fertilization appeared,from which it is clear that the amount should be better below 3.40 t/hm2.Applying this amount,the theoretical corn yield is probably over 6.91 t/hm2,reaching the best economic benefit.