In order to screen suitable soybean varieties for the promotion of corn and soybean strip composite planting model, this experiment adopted a “4+4 planting model” (4 rows of corn+4 rows of soybean), with 5 treatments repeated 3 times, namely T₁ (Ningdou No. 6), T₂ (Zhonghuang 318), T₃ (Chengdou No. 6), T₄ (Tiefeng 31), and T₅ (Liaodou No. 15). The corn variety was Xianyu 1225, and the growth period, agronomic traits, yield, and economic benefits of each treatment of soybean were compared and analyzed. The results showed that the soybean growth period of each treatment was between 143 and 145 days, and the T₄ treatment performed the best in agronomic traits such as plant height and bottom pod height. The number of beans per plant was higher in T₄ and T₂ treatments, with 49.36 and 48.55 seeds respectively. The highest yield was observed in T₄ treatment (1 384.65 kg/hm²), followed by T₂ treatment (1 296.60 kg/hm²). The trend of economic benefits and yield changes was consistent, with T₄ treatment being the highest. Based on the performance of various varieties, the soybean variety Tiefeng 31 was selected as a high-quality soybean variety suitable for promotion and planting in the study area as a belt shaped composite planting model for corn and soybean.