The invention provides a cabinet plugging device, and belongs to the cabinet plugging fitting technology field. A cabinet wire inlet device which is convenient to install, is convenient for wiring and can be used for multiple times is provided. The cabinet plugging device comprises a left housing and a right housing. The left housing and the right housing are both a rectangular frame with opening at one side. The left housing and the right housing are in insertion connection together correspondingly and form an enclosed rectangular frame. Clamp hooks and clamp rings are arranged in corresponding insertion positions of two sides of the left housing and two sides of the right housing respectively. The clamp hooks and the clamp rings are in clamping connection together correspondingly to lock the left housing and the right housing tightly. One or more crossbeams are transversely arranged in the rectangular frame formed by the left housing and the right housing through cooperation. The crossbeams are arranged in the insertion direction of the left housing and the right housing. The rectangular frame formed by the left housing and the right housing through cooperation is divided into a plurality of cable channels by the crossbeams. The cable channels are used for wiring. The cabinet plugging device is suitable for various cabinets.