Objective To observe the effect and safety of ambroxol combined with antibiotic in treatment the elderly diabetic patients complicated with pneumonia.Methods 86 elderly diabetic patients with pneumonia were selected and divided into observation group and control group according to different treatment options.All the patients were given oxygen,suction,nutrition therapy,postural drainage and basic treatment for diabetes.Cefoperazone sulbactam was given in control group,5.0g dissolved in 150 ml saline,1 time/d.Ambroxol hydrochloride injection was added in observation group,40mg/kg dissolved in 150 ml saline,1 time/d.Body temperature,sputum,leukocyte and chest X-ray were observed and recorded,and the recovery time was recorded.Results 37 cases were cured,6 cases improved in observation group,and the total effective rate was 100.00％.28 cases were cured,12 cases improved in control group,and the total effective rate was 93.02％.The effective rate of the observation group was higher than the control group(P ＜0.05).The incidence rate of adverse reactions in observation group was 6.98％,while 4.65％ in control group,and there was no statistical difference between the two groups (P ＞ 0.05).Conclusion Ambroxol hydrochloride added to antibiotic routine therapy in treatment the elderly diabetic patients complicated with pneumonia couldimprove the cure rate and shorten the healing time.It was worthy of clinical application.