Objective To evaluate the effects of hanging by the feet OAC-CPR in patients with big hemoptysis suffocation and cardiac arrest.Methods 68 cases of big haemoptysis suffocation and cardiac arrest were randomly divided into two groups.The control group(38 cases) was treated by standard CPR treatment method.The study group (30 cases) was treated by hanging by the feet OAC-CPR method.Results Return of spontaneous circulation (ROSC) of study group was obviously higher than that of control group( 80.0％ vs 55.3％,x2 =4.58,P ＜ 0.05 ).24hours survival of study group was obviously higher than that of control group ( 70.0％ vs 44.7％,x2 =4.34,P ＜0.05).Conclusion Hanging by the feet OAC-CPR can do cardiopulmonary resuscitation and air passage clearing simultaneously in emergency treatment more sufficiently and successfully.