Abstract: Intercropping of different maize varieties with wheat was studied by increasing maize plant density-6000 plant per mu while The conventional variety Badan3 was cultivated 4000 plants per mu. the comparative results showed that the yield was in a sequence of Xundan20〉ND314〉Badan3〉Yongyu3〉Zhenjin8. Comparing with Badan3, the yield of Xundan20 and ND314 increased by 17.1% and 10.2% respectively. Ear rows were almost invariant and kernels per row reduced, so yield increasing was owing to ears per mu increasing. Comparing with Badan3, the water use efficiency of Xundan20 and ND314 increased by 20.08% and 15.33% respectively. For Xundan20 and ND314, the largest leaf area index reached 7-8 and dry matter accumulation content before filling stage was higher than other varieties, so this would be large source for yield increasing.