A quick cable bending apparatus comprises nipper pliers and a bending assembly. The bending assembly includes a U-shaped accommodation plate and a U-shaped press block. The nipper pliers include a first clamp arm, a second clamp arm, a hinge shaft, a first clamp handle and a second clamp handle. The first clamp arm and the second clamp arm are hinged to each other through the hinge shaft in a relatively rotating manner. The first clamp handle and the second clamp handle are arranged on one end of the first clamp arm and on one end of the second clamp arm respectively. The other end of the first clamp arm and the other end of the second clamp arm are connected to the U-shaped accommodation plate and the U-shaped press block respectively. The secondary cable bending speed is effectively increased, the physical strength of construction workers is reduced, and the bending consistency of secondary cable cores is ensured. The quick cable bending apparatus is easy to operate, labor-saving and time-saving when being used for cable bending, unified and nice processes are exhibited, the damage to cable insulating layers is minimized, requirements of secondary cable standard construction processes for national power grid companies are fully satisfied, and the work efficiency of secondary wiring is greatly improved.