Prefabricated cabin

The invention relates to a prefabricated cabin comprising a cabin body and a plurality of electrical cabinets arranged side by side in the cabin body, wherein the internal sidewall of the cabin body is provided with a junction box; internal cables connected to the electrical cabinets are drawn from the junction box; the top and/or the bottom of the front surface of each electrical cabinet and/is provided with a recessed structure(s) recessed towards the interior of the electrical cabinet; the recessed structures are in communication so as to form a cable passage; and the wall of the cable passage is provided with a cable port for the internal cables to enter the electrical cabinets. The recessed structures are arranged on the tops and/or the bottoms of the front surfaces of the electrical cabinets and have positive openings facing the interior of the prefabricated cabin. The adjacent electrical cabinets form the through cable passage via the side openings of the recessed structures for laying the internal cab