The invention provides a live operation conductor drainage fixing device and a using method thereof. The device comprises a base, a casing, a fixing part, movable pull rods, operation handles, clamping parts, and springs. The device is characterized in that the casing is arranged above the base, the fixing part is arranged at the upper end of the casing, the movable pull rods are arranged inside the casing, and the operation handles are arranged at the lower ends of the movable pull rods respectively; the upper end of each clamping part is provided with a semi-cylindrical groove, the lower ends of the clamping parts are fixedly connected with the top ends of the movable pull rods respectively via through holes in the lower end of the fixing part, the springs are arranged side by side on the outside walls of the movable pull rods, and the springs are arranged between the clamping parts and the through holes; the base and the clamping parts are shaped as the same rectangle; and the casing and the movable pull rods are cylinders. The beneficial effect is as follows: in the process of drainage line connection during live operation, a conductor and a drainage line can be fixed and smoothly pass through a parallel groove clamp at the same time, and thus, drainage line connection during live operation can be completed in a quick, labor-saving and safe manner.