The invention discloses an opening and closing structure of a power supply cabin, which is used for a hearing aid and comprises a power supply cabin. The bin cover is detachably arranged on the power supply bin; the battery is detachably arranged on the bin cover; the composite connecting mechanism comprises a spring, a sliding plate and a connecting block, the sliding plate is slidably arranged on the power supply bin, the spring is arranged on the shell and connected with one end of the sliding plate, the connecting block is hinged to the other end of the sliding plate, and a connecting groove matched with the connecting block is formed in the bin cover. The bin cover is rotated and slid to be installed on the power supply bin. According to the structure, the spring and the sliding plate capable of sliding are arranged to move back and forth, and meanwhile, the connecting block capable of rotating and swinging is arranged, so that the bin cover can be pulled out and turned over to a greater extent when the hearing aid battery is replaced, and the requirements of a user for replacing the hearing aid battery simply, conveniently, stably and easily cleaned are met. The structure design is ingenious, the sliding guide rail plane and rotating shaft characteristics are flexibly applied, operation is convenient, and practicability is high.