The invention relates to a rack and a secondary equipment prefabricating cabin employing the same. The rack comprises a rack body which is used for being fixed in the prefabricating cabin, wherein the rack body comprises more than two vertical frames which are arranged side by side on the left and right; a mounting compartment for being enclosed into secondary equipment from the front side is formed between two adjacent vertical frames; a gap is formed in the front side of each vertical frame; and the gaps in the same column of vertical frames form a through cable pavement channel through which a cable passes. The gaps in the same column of vertical frames form an open cable pavement channel for pavement of the cable, so that early cable installation and later equipment renovation and expansion operations by the personnel are facilitated; the debugging time is shortened; and the connection efficiency is improved. Furthermore, the rack is fixedly arranged in the prefabricating cabin and the rack and the prefabricating cabin are integrally designed, so that the problem of heavy operation that an overall traditional screen cabinet enters the cabin is solved.