Prefabricated cabin rack and prefabricated cabin

The invention relates to a prefabricated cabin rack and a prefabricated cabin. The prefabricated cabin rack comprises a plurality of sets of rack units, and each rack unit comprises a first vertical frame and a second vertical frame, wherein the second vertical frames and the first vertical frames in every two adjacent rack units meet the condition that the size of the second vertical frames is smaller than that of the first vertical frames in the front-back direction; a U-shaped plate is fixed to the front side of each second vertical frame and comprises a first folded edge, a second folded edge and a bottom plate; the U-shaped plate is fixed to the front side face of the second vertical frame through the bottom plate, the first folded edge is turned outwards to form a vertical frame fixing turned edge, the second folded edge is provided with a fixing hole and fixedly provided with a panel assembly through the fixing hole, and the panel assembly is provided with a wire outlet. Compared with the prior art, wh