r**k theory provides a prospective tube method of safety management, more and more people's attention and widely applied, its essence ** the most economic and reasonable way to eliminate the r**k of damaging consequences. based on the enterpr**e common r**k, expounds the necessity of project r**k management, through the r**k identification, assessment and evaluation, and some methods of r**k response, can prevent and reduce the r**k of civil engineering, subway has reached to reduce r**k of purpose.keywords: common r**k, r**k analys**, r**k response 20210311