Abstract： Objective To explore the correlation between basic lung function and daily living ability in patients with spinal cord injury(SCI),so as to better apply basic lung function indicators for clinical application,guide cardiopulmo-nary rehabilitation training,and provide theoretical basis for improving patients'daily living ability.Methods The clini-cal data of 148 hospitalized SCI patients in the author's hospital from August 2017 to July 2022 were retrospectively ana-lyzed.Gender,age,duration of disease,whether had pulmonary infection,smoking history,body mass index(BMI),neurological level of injury,American spinal injury association(ASIA)classification and basic lung function indexes inclu-ding tidal volume(VT),forced vital capacity(FVC),forced expiratory volume in one second(FEV1)and forced expira-tory volume in one second(FEV1/FVC),maximum voluntary ventilation(MVV),maximal voluntary ventilation/maxi-mal predicted voluntary ventilation(MVVpred),expiratory vital capacity(EVC),peak expiratory flow(PEF),forced expiratory flow at 25％of FVC exhaled(FEF25),forced expiratory flow at 50％of FVC exhaled(FEF50),forced expira-tory flow at 75％of FVC exhaled(FEF75)were collected.Using the modified Barthel index(MBI)as the dependent vari-able,the independent risk factors of daily living ability in patients with SCI were screened by univariate and multivariate linear re-gression.Results The univariate and multivariate linear regression results showed that MBI was significantly correlated with VT(β=0.024,P＜0.001),MVVpred(β=0.385,P＜0.001),nerve injury plane T plane(β=10.613,P=0.009),L plane(β=12.207,P=0.012),S plane(β=27.994,P=0.005),ASIA classification(CDE)(β=24.550,P＜0.001)and gender(famale)(β=9.956,P=0.024)in SCI patients.Conclusion The VT and MVVpred of basic lung function indexes are closely relat-ed to the daily living ability of SCI patients,cardiopulmonary rehabilitation should be strengthened in the course of treat-ment,so as to improve the daily living ability of patients.