Abstract: In order to screen silage maize varieties with better comprehensive traits, observation indexes（seeding date, seedling stage, shooting stage, tasseling stage, silking stage, milk stage, ripening stage）, indexes of agronomic traits（plant height, ear height, leaf number per plant and stem thick）, production indexes（fresh grass yield and fresh-dry ratio and hay yield） and nutrient content（dry matter, crude protein, acid detergent fiber, neutral detergent fiber） of crop age from 11 silage maize varieties（Anzao 10, Dongdan 1991, Jinling silage 10, Wenyu No.3, CP1685, Xinsiyu 14, Aoyu silage 5102, Dongdan 1331, Tunyu661, Yayu No.8,Xinsiyu 11）was measured. The quality of 11 silage maize varieties was evaluated by grey correlation analysis. The results showed that all the 11 silage maize could complete the whole growth period in Chifeng area, and the growth period ranged from 94 to 125 days. The growth period of Anzao 10 was the shortest, and that of Xinsiyu 11 was the longest. The plant height of 11 silage maize varieties ranged from 260.02 cm to 327.04 cm, the highest was Yayu No.8 and the lowest was Anzao 10. Ear height ranged from 103.51 cm to 175.01 cm, the highest was Yayu No.8 and the lowest was Anzao 10. Leaf number per plant ranged from 12.13 to 18.71, the most was Aoyu silage 5102, and the least was Anzao 10. The stem thick ranged from 18.62 cm to 24.98 cm, the largest was Aoyu silage 5102, and the smallest was Dongdan 1991. The fresh grass yield of 11 silage maize varieties ranged from 59 333.33 kg/hm~2 to 144 000.00 kg/hm~2, the highest was Yayu No.8, and the lowest was Anzao 10. Hay yield ranged from 31 941.01 kg/hm~2 to 50 845.69 kg/hm~2, the highest was Tunyu 661 and the lowest was Aoyu silage 5102. The fresh-dry ratio ranged from 1.75 to 4.33, the largest was Aoyu silage 5102, and the smallest was Anzao 10. The dry matter content of 11 silage maize varieties ranged from 93.93% to 94.90%, the highest was Aoyu silage 5102, and the lowest was Dongdan 1331. The crude protein content ranged from 8.88% to 10.00%, the highest was Aoyu silage 5102, and the lowest was Xinsiyu 14. Acid detergent fiber content ranged from 16.97% to 26.02%, the highest was Aoyu silage 5102, and the lowest was Anzao 10. Neutral detergent fiber content ranged from 36.39% to 48.86%, the highest was Aoyu silage 5102, and the lowest was Anzao 10. The comprehensive performance of Aoyu silage 5102 was the best, followed by Yayu No. 8 and Xinsiyu 11, Anzao 10 and Dongdan 1991 were poor. The results indicated that among 11 silage corn varieties, Aoyu silage 5102 was the most suitable silage variety with high quality and high yield for planting in Chifeng area.