Abstract: The regularity on the evolution of principal elements and the water-rock interaction mechanism in the process of alterated rocks formation were discussed according to the studies on Dayingezhuang,Xiadian,Qilishan,Shangzhuang and Lazigou gold deposits,Jiaodong Peninsula.The results show that in the reddenization alteration process of protolith,SO3 was generally carried in;Al2O3,TiO2,SrO,BaO were generally brought out;K2O,Na2O,CaO,MgO,TFe2O3,SiO2 were carried in or brought out,depending on different districts;in the process of beresitization or sericitization of protolith,K2O and SO3 were generally carried in,and Na2O,Al2O3,SrO,BaO were generally brought out;CaO,MgO,SiO2,TFe2O3 were carried in or brought out,depending on different districts.In gold deposits in Jiaodong Peninsula,the reddenization alteration was a kind of associative alteration consisting of potassium feldspar alteration,albite alteration,hematite alteration,rutile alteration,chlorite alteration,calcite alteration,and generally was formed in the physical and chemical conditions of high oxygen fugacity and weak alkalinity.The gold orebodies and beresite formed in the physical and chemical conditions of reducibility and weak acidity.In the background of telluric electricity field,the water-rock interaction system of gold deposits in Jiaodong Peninsula is an electrochemical reaction system related to the natural electrolysis-ionization reaction.