Abstract: ObjectiveField performance of silage corns was evaluated to screen the silage corn varieties (lines) that suitable for cultivation in center of Guangxi. MethodFourteen silage corn varieties(lines) were used as experiment materials and planted in mechanical manner . Phenological phase , agronomic characters and occurrence of major disease were investigated during growth period, and disease resistance were analyzed. Biomass was tested at harvest period. The field performance of silage corn varieties (lines) were evaluated combining multiplex characters. ResultThere was obvious dif-ference in plant height among the varieties(lines), the highest variety was Lüqingsi 4324 with 280.2 cm and the shortest was Quchen 19 with 232.2 cm. Lodging(15.0%) and bareplant(12.0%) occurred in Yuqingzhu 23; Guiqingzhu 1 had the highest yield of fresh weight(63645 kg/ha), dry matter yield of Liuyuqing 3 was the highest(23589 kg/ha). Rust incidence of 14 corn varieties(lines) were 0-100.00%,and nine varieties(lines) were classified into high resistance(HR) level. In-cidence of sheath blight were 0-60.00%, Beinongqingzhu 208 and Dika 018 were at moderate resistance(MR) level,the others were HR. Incidence of stem rot was 0-50.00%,Guiqingzhu 1,Beinongqingzhu 208,Zhengda 999 and Quchen 9 were at HR level. Results of clustering analysis on disease were consistent with disease resistance grade. ConclusionRe-garding agronomic characters, biomass and disease resistance, Guiqingzhu 1, Zhengda 999, Huayou 168, Liuqingzhu 4, Liuyuqing 3 and Lüqingsi 4323 are suitable for planting in center of Guangxi.