Multifunctional combined wire duct

The invention relates to a combined wire duct which comprises at least two single wire ducts which are connected in sequence, and a connecting structure between the single wire ducts comprises a butt-joint plugboard which is arranged at the end part of one single wire duct in parallel and a butt-joint matching plugboard which is arranged at the end part of the other single wire duct in parallel; wherein a plurality of butt-joint jacks are formed in the butt-joint plugboard, and the plurality of butt-joint jacks are annularly distributed at intervals; a plurality of butt-joint insertion blocks matched with the plurality of butt-joint insertion holes are arranged on the butt-joint matching insertion plate; when the butt-joint insertion plates are attached to the corresponding butt-joint matching insertion plates, the butt-joint insertion blocks are embedded in the butt-joint insertion holes. Compared with the prior art, on one hand, the butt joint matching insertion plates and the butt joint insertion holes whi