Abstract: In this study，We took JiTian-6 as the materials，randomized block design with three replications was used and Fertilizer for the decision variable which researched on the yield formation of the Sweet corn.Through researching on the Main Agronomic Characters of JiTian-6，the results showed as follows：the effects of different fertilizations on individual plant botany properties（ear length，ear diameter，long and pointed convex）were evident.This is also the main reason for the difference among individual plants.Raising the level of fertilization has a significant effect on improving yield of sweet corn，manifested as increasing single ear yield，thus increasing the overall yield.