The utility model relates to line construction auxiliary equipment in the electric power industry, in particular to a portable mobile operating room for manufacturing and testing cable heads, so as to solve the problem that the construction environment cannot be ensured during the field urgent repairing construction of power distribution cables. The portable mobile operating room comprises a top plate, side wall plates A, side wall plates B, a bottom plate and cable supporting plates, wherein a transparent thermal insulating plate is embedded in a framework formed by the top plate, the side wall plates A, the side wall plates B and the cable supporting plates, and the lower part of each side wall plate A is provided with a cable inlet; the bottom part is composed of two fixed treads and a cable releasing plate, and the cable releasing plate is hinged and connected with the edge of one fixed tread on one side; the two cable supporting plates are respectively hinged and connected with both ends of the cable releasing plate; the operating room is formed by the top plate, the side wall plates A, the side wall plates B and the bottom plate through plug-in mounting; and the cable supporting plates are matched with the cable inlets at the lower parts of the side wall plates A. The portable mobile operating room is simple in structure, is convenient to disassemble and transport, creates a good environment for outdoor urgent repairing construction of cable heads, improves the working efficiency, guarantees the quality of construction.