The invention relates to the field of the hot line work of a 10kV power distribution network, in particular to an operation method and device for additionally arranging a column switch on a linear rod improved strain section. The method is characterized in that a lead is lifted and descended by a self-hanging insulation cross bar in an assisting mode, then the column switch is positioned by an insulation bucket arm vehicle, and equipment does not need to transfer and carry a load in the operation flow of the whole column switch arranging process. Compared with the prior art, the operation method and device for additionally arranging the column switch on the linear rod improved strain section have the beneficial effects that (1) a hot line work technology is adopted, the power of enterprises at the lower end of the line is not influenced, after being mounted, the column switch can be directly put into use without the need of reducing the lower end load of an operation point, the number of people participating in the operation is reduced and the whole operation time is shortened; (2) the column switch is hoisted and mounted by an insulation crane arm of the insulation bucket arm vehicle, so the labor intensity of operation staff in the insulation bucket is reduced; participating of hoisting vehicles is reduced and the operation difficulty is reduced.