A cleaning tool characterized by live-line operations comprises an insulating rod, an expansion mechanism and an operation rope. The expansion mechanism comprises an installation head, L-shaped rod members, a pin and torsion springs. The lower end of the installation head is a sleeve while the upper part of the installation head is flat. The vertically arranged pin is fixed on the upper part of the installation head. The pin parts on the two sides of the installation head are respectively provided with a pair of L-shaped rod members in a hinged way. The torsion springs are arranged between each L-shaped rod member and the pin. Two adjacent L-shaped rod members among the two pairs of L-shaped rod members are integrally connected through rivets. The operation rope is tied on the rivets and led to the lower end of the insulating rod. The tool which can perform live-line operations on high-altitude live-line cables has great insulating effects. Meanwhile, the cleaning efficiency can be improved. The labor intensity of workers can be greatly reduced.