The invention provides a coreless lock for an outdoor unmanned cabinet, which is not liable to steal and damage. The coreless lock comprises a lock module and a key module; and a rocking arm of the key module is matched with a rotating tongue of the lock module to realize opening and closing through axial movement and radial rotation. The coreless lock has the following beneficial effects: a coreless lock hole is of a hollow structure; the rotating tongue sleeves a fixed empty sleeve, so that a lock cylinder cannot be seen due to incapability of observing, the structure cannot be known, and the acting principle cannot be analyzed; and the coreless lock cannot be opened without a special key, is not liable to damage, is simple in maintenance, and is more suitable for such precious facilities as the outdoor unmanned cabinet. Various lock types can be converted through changing connecting modes and structures of the rotating tongue of the lock, so that the application field and purposes are widened.