In this paper we points out that there are three high electrical conduc-tivity anomaly (HECA) belts within Gansu province.One is the DV pat-tern north-east belt of HECA between Jayuguan and Hexibao,the other two are the HC pattern area of HECA in Jingtai and the DV pattern east-west belt of HECA between Dingxi and Tianshui.According to E.C.-Bullar's view,we suggest that their buried depth be from the crust to upper mantle.
In addition,based on the distribution of underground water and hot springs,we analyse the cause of HECA.Consequently,it is emphasized that these high conductivity regions play an important role on the earthquake prediction.