The tower structure and voltage level of 35 kV line are between distribution line and transmission line, which makes it difficult for live operators to choose appropriate electric field protection measures. In order to ensure the safety of live-line working on 35 kV lines, the spatial electric field distribution of 35 kV single circuit and double circuit towers and the electric field intensity of live line operators at different working positions are simulated and calculated by finite element method, and the electric field intensity on the surface of live-line operators at different working positions is analyzed. The distribution characteristics and change rules of electric field on the human body surface of the operators, and the corresponding personnel protection requirements are put forward. The calculation results show that the electric field intensity on the human body surface at the working position is within the limit value when the workers are working on the 35 kV single circuit and double circuit line poles under four typical working conditions, which meets the standard requirements and does not need to wear the live working shielding clothing. The research results provide a technical basis for guiding the safe development of live line operation of 35 kV lines.