Method for breeding descendants of wild beans inter-planted with sugarcanes

The invention discloses a method for breeding descendants of wild beans inter-planted with sugarcanes. The method comprises the following steps: (1) selecting a wild soybean descendant-breeding material which possesses the following characteristics: (1.1) the hundred-grain weight is 7g or higher, (1.2) the growth duration is within 100 days, (1.3) crawling climbing character is available, (1.4) the plant height is 1.8m or higher, (1.5) the number of grains per plant is 120 or higher, (1.6) ponds of the soybeans do not crack after ripening, and (1.7) the character is stable and consistent; (2) selecting a sugarcane variety: selecting the sugarcane variety with the plant height of 1.5m or higher and the growth duration of 120-140 days; (3) sowing and cultivating the sugarcanes: after sowing the sugarcanes 25-35 days, when sugarcane seedlings grow in 20-40 cm, sowing the wild soybean descendant-breeding material with the characteristics of step (1) to the root of each sugarcane, after emergence of soybean seedli