Tower crane cable insulation load reducing device capable of being rapidly fixed

The utility model relates to the technical field of tower cranes, in particular to a tower crane cable insulation load-reducing device capable of being quickly fixed, which comprises a mounting frame, a fixed rod, a sliding rod and an elastic mechanism, the mounting frame comprises a plurality of hollow pipes which are connected with one another; the fixing rod is connected with the mounting frame, and a first porcelain bottle is rotationally arranged on the fixing rod; the two ends of the sliding rod are slidably connected with the mounting frame, the sliding rod is parallel to the fixed rod, and second porcelain bottles corresponding to the first porcelain bottles are fixedly connected to the sliding rod; the elastic mechanism is arranged at the sliding joint of the sliding rod and the mounting frame and used for providing elastic force facing the fixed rod for the sliding rod. A notch is formed in one side of the mounting frame and communicates with the gap between the fixed rod and the sliding rod. The ca