In the work of electromagnetic exploration

if the laying of high voltage power lines in the working area

it will affect the measurement results of field electromagnetic method. It is of great significance to study the influence of high voltage line on the work of electromagnetic method. In this paper

the AEMT（air electric field magnetotelluric method） work carried out in a tailings reservoir in Shangrao

Jiangxi province is analyzed by the interference of high voltage power transmission lines

the law of AEMT interference is discussed effectively by data processing

and the data reliability is increased. Some suggestions for AEMT field work in the future are given.