The invention provides a support (operating platform) for an intermediate head of a large-section single conductor cable, which is used to connect cables with the advantages of quickness, convenience, safe operation process and guarantee of connection quality. Meanwhile, after the construction is finished, the support can be used as a support platform required by fixing the large-section single conductor cable for a long time. The support comprises a support body, two coaxial hoops, two hoop seats, a horizontal sliding rack, a lifting device and a pressure clamp fixing device, wherein the twocoaxial hoops are used for compressing the cables tightly and respectively arranged on the two hoop seats; the two hoop seats are slidably arranged on the support body along the axial direction parallel to the hoops; the horizontal sliding rack is slidably arranged on the support body along the axial direction vertical to the hoops and positioned between the two hoop seats; the lifting device drives the pressure clamp fixing device to lift and descend vertically and is arranged on the horizontal sliding rack; and the pressure clamp fixing device is used for fixing a pressure clamp and connected with the lifting device.