The invention discloses an automatic sorting and feeding device for vegetable grafting clips, and an application method thereof, and relates to the technical field of agricultural machinery design. The automatic sorting and feeding device comprises an electromagnetic vibration device, a grafting clip accommodating cavity, a spiral-conveying main track and at least one sorting and conveying track.The electromagnetic vibration device provides a driving force; the grafting clip accommodating cavity is formed in the upper end of the electromagnetic vibration device, vibrates under the drive of the electromagnetic vibration device, and is provided with an inner cavity; the spiral-conveying main track is arranged on the inner edge of the grafting clip accommodating cavity, and is used for spirally conveying grafting clips in the grafting clip accommodating cavity; the input ends of the sorting and conveying tracks are connected with the output end of the spiral-conveying main track, the outer edges of the sorting and conveying tracks are arranged in an upward inclination manner, and the sorting and conveying tracks are used for sorting the grafting clips. The automatic sorting and feeding device has the advantages that the unordered grafting clips can be conveyed in a single line after sorting, so that accurate and reliable sorting is realized, and the clip conveying and feeding efficiency is high; the automatic sorting and feeding device can adapt to sorting and feeding of the grafting clips universal for current vegetable grafting, thereby providing an important support for the development of affordable automatic vegetable grafting machines.