Abstract: Objective To explore influencing factors of all-cause mortality in adults aged 55 years and over in Beijing city. Methods Cox proportion hazard regression model was used to analyze the influencing factors of all-cause mortality. Results Female adults had a decreased risk of death than male adults(relative riskRR=0.543,95% confidence interval95%CI=0.434-0.678).The risk of cardiovascular diseases(CVD)mortality increased sharply with age,and the adults with hypertension(RR=1.348,95%CI=1.145-1.588),hyperglycemia(RR=1.512,95%CI=1.278-1.789),disability(RR=1.327,95%CI=1.129-1.559),a self-assessment of unhealth(RR=1.194,95%CI=1.006-1.416),and illiteracy(RR=1.644,95%CI=1.133-2.386)had significantly increased risk of CVD death.Mortality in rural adults was significantly lower than in adults of mountain villages(RR=0.666,95%CI=0.539-0.840). Conclusion With disability,self-assessment of unhealth,hyperglycemia,hypertensive,and illiteracy are risks factors for all-causes death among adults aged 55 years and older in Beijing city.