Abstract: The quality situation and pollution degree of groundwater directly represent its environment quality.The article assesses the groundwater environmental quality in Liaoning Province by analysesing the conents of related chemical composition which represents the dynamic characteristics of groundwater quality.The factors which affect groundwater environmental quality originate mainly from two aspects,i.e.,natural factors and artificial ones.The protection measures against groundwater quality pollution can be taken from three aspects,i.e.,natural environment,artificial environment and time factor.