The invention discloses a method for operating a tower line using earth potential-breaking and draining line of an arc-suppressing rope. 8 people must be required to carry out the change operation: 1person in charge of work, 1 person in charge of guardian, 3 electricians in charge of earth potential 3 (electricians 1, 2, 3 for ground potential) and 3 electricians on the ground. The operation comprises the operations of exiting the switch associated with the terminal of the line, carrying the tool of a climb pole, connecting special arc extinguishing drain line fixtures and the like. The method provided by the invention innovates, supplements and perfects the method of live working, reduces the workload of the substation operator at the same time, reduces the operational risk and labor intensity of the live working personnel and improves the work efficiency. And the use and promotion of the results create good economic and social benefits in terms of power sales, line availability andquality services.