Disclosed are an optical disc drive installation mechanism, and an outer frame for installing an optical disc drive. The optical disc drive installation mechanism includes: an optical disc drive module and an outer frame which is configured to insert or pull out the optical disc drive module, and a buckle is connected to a side surface of the optical disc drive module; a buckle limiting hole is disposed on a first side surface of the outer frame; and a groove is further disposed on an outer wall on the first side surface of the outer frame, a fixedly connected spacing elastomer is disposed on an inner wall on a second side surface of the outer frame, the spacing elastomer and the first elastic part are configured to lock or unlock the optical disc drive module, and a first side surface is perpendicular to the second side surface.