Abstract: The yield-correlated characters of sweet corn were analyzed by AMMI model analyzing method based on the regional trial data of sweet corn in 2008-2011 in Fujian. The results showed that plant height, height of ear location, ear length and rows per ear were determined by genotype effect, and the yield, days from emergence to harvesting, ear thickness were determined by environment effect, and grain number per row and fresh weight of 100 grains were determined by genotype譭nvironment interaction effect. As the traits stability, the best were ear length, ear thickness and rows per ear, and the secondly were days from emergence to harvesting, grain number per row and fresh weight of 100 grains, and the thirdly were plant height, height of ear location, the poorest was yield. And different traits showed different genotype譭nvironment interaction effect under different ecological condition.