The invention relates to an insulation transmission device, in particular to an insulation aerial ladder transmission device adaptive to the ultra high voltage charged environment. The insulation aerial ladder transmission device comprises an insulator assembly, a hoisting unit, a base and a trangle support. One end of the insulator assembly is connected to the base, the trangle support is slidably connected to the insulator assembly, the hoisting unit is arranged at the end of the insulator assembly connected to the base and is connected to the trangle support. The trangle support moves on the insulator assembly through the hoisting unit. By the aid of the insulation aerial ladder transmission device, automatic transmission of a device in strong electromagnetic field environment is realized.