"Turning bananas yellow" and "turning tomatoes red" belong to "ripening" fruits. Methods of ripening fragrant coke: various methods such as ethylene aeration method, ethephon ripening method and Yiling ripening method were adopted. The beneficial elf ripening method is often used, that is, 40% beneficial elf (2- chlorohexyl phosphoric acid, with a concentration of 0. 15%-0.2%) is sprayed evenly on and around the basket containing bananas, left three times and right three times, stacked together, covered tightly with plastic sheets, and the temperature and humidity are controlled well. After two days of boring, the plastic sheets can be removed, and the bananas can be removed after three days.