The invention discloses an environment-friendly method for preventing corn female ear bags from falling off. The method is characterized by including the following steps that when female ears expand and before filaments are exposed out of bracts, 45-degree angles are formed through bending in the horizontal direction of leaf surfaces and at the positions, 10 cm away from leaf sheaths of stalks, of corn cob position leaves, and sheep skin paper bags 18 cm in length and 11 cm in width are wholly put in the corn cob position leaves and the female ears in a sleeving mode and embedded into the bonding positions of the leaf sheaths and the stalks. According to the method, the 45-degree angles are formed through bending in the horizontal direction of the leaf surfaces and at the positions, 10 cm away from the leaf sheaths of the stalks, of the corn cob position leaves, then the sheep skin paper bags are wholly put in the corn cob position leaves and the female ears in the sleeving mode, the sheep skin paper bags are supported through the corn cob position leaves, the bags are fixed by themselves in the mode that the female ears and the bent portions of the corn cob position leaves naturally grow to form expansion resistance with the sheep skin paper bags, the problem that the bags fall off in the bagging period is solved, and the influence of reduction, caused by breaking of the corn cob position leaves, of the selfing line hundred-grain weight is avoided.