Different Soluble components of insulator contamination can lead to great differences of insulator’s insulating property. And equivalent salt deposit density（ESDD） is a main indicator to characterize insulator’s insulating properties. Thus

it is important to study the influence of soluble components of insulator contamination on ESDD. In this study

according the insulator pollution accumulation experimental based on the XP-70 suspended insulators in the natural environment with 6 months

samples with different months are collected. The cations and anions contents in collected sample solution are obtained by ion chromatography（IC） and atomic absorption spectrometry（AAS）

respectively. The average daily values of cations and anions are analyzed. Then

the correlations between the various soluble components of insulator contamination and ESDD are analyzed. The results display that content of Ca2+and Na+is higher in insulator contamination in Wuhan

which average daily values are about 0.6 mg/L and 0.2 mg/L

respectively. Moreover

the correlation between ESDD and Ca2+ is 0.96

as well as that for F-

CO32-and SO42-are all about 0.8. However

the correlations between ESDD and Cl-

Na+ is about 0.2 and 0.1

respectively. The analysis can consulate that ESDD mainly is influenced by Ca SO4

Ca F2 and Ca CO3 while Na Cl has an little effect on ESDD due to Wuhan is an inland city. The results have an immeasurable referential significance on the cleaning time selection for Insulator Contamination of electric transmission line and revealing pollution flashover mechanism.