The invention discloses a junk processing method and apparatus, and a mobile terminal, relating to the technical field of communication and providing the running speed of the mobile terminal. The junk processing method includes presetting the storage path of the junk images to be detected and the image information of the junk images to be detected; acquiring the image information stored in the storage path based on the storage path of the junk images to be detected; sequentially matching the acquired image information with the image information of the junk to be detected; and counting the junk images having matched acquired image information and image information of the junk images to be detected and sending junk image processing instructions to a user, the junk image processing instructions including the number and size of the junk images. The junk processing method and apparatus are suitable for the redundancy file cleaning of the mobile terminal.