Abstract: On the basis of a great deal of field investigation and indoor study,it is ascertained that a layer of kaolinite deposit in thickness of 0.60～1.30 meters occurred in floor of coal bed No.11 in southern district and in mid-lower part of coal bed No.11 in northern district in Hancheng mining area.This layer of kaolinite is characterized by stable thickness and plentiful reserves,being a large-scale kaolinite deposit with pure of ore composition,over 95% kaoline content,high Al₂O₃ content,lower SiO₂ content,higher TiO₂ content and low to high Fe₂O₃ content.The research shows that the kaolinite layer in Hancheng can be used as the raw material for producing ultra fine calcination kaolin and 4A molecular sieve,etc.