Abstract: Based on the data collation, data quality and interference analysis of the geoelectric field observation data of Tengchong Central Station from 2018 to 2022, it is considered that the geoelectric field data of Tengchong Central Station have good correlation with the long and short polar distances in the same direction without interference, with clear diurnal variation and high data reliability. The interference types can be roughly divided into two categories : natural environment interference and artificial interference. Among them, the interference of geoelectric storm, lightning and rainfall belongs to natural environment interference, and the interference of artificial power supply and site leakage belongs to artificial interference. The interference change form caused by geoelectric storm is mainly a large sharp pulse conflict jump similar to seismic waveform. The interference change form caused by lightning is mainly a typical large amplitude distortion. The interference change form caused by rainfall is mainly a large decrease. The interference change of geoelectric field data caused by ground resistivity power supply in the same observation site is mainly a regular pulse conflict jump. The form of interference change caused by street lamp leakage is mainly step-type periodic change. Through the analysis of different types of interference sources caused by geoelectric field change form and physical mechanism, and puts forward the method to solve the interference, so as to improve the quality of geoelectric field observation, to provide a basis for the effective identification of geoelectric field interference and earthquake prediction.