An adjustable housing frame with industrial rails includes a fixed plate, two movable plates and at least two positioning pieces. A front side of the fixed plate is provided with a rail. Both ends of the fixed plate are provided with two opposite rails respectively. Each set if the two opposite rails is provided with at least one positioning hole. One of the two movable plates is provided in the two rails at one end of the fixed plate, and the other movable plate is provided in the two rails at the other end of the fixed plate. Edges of the two movable plates are provided with a plurality of positioning troughs. The two positioning pieces pass through the two positioning holes and extend into the positioning troughs respectively. The two positioning pieces are stopped on inner walls of the positioning trough.