Objective To analyze the types and risk factors of community-acquired infections (CAI)in diabetic patients by system analysis method of evidence-based medicine.Methods China National Knowledge Infrastructure (CNKI),Wanfang database,VIP database were searched by computer,domestic published researches on CAI and related risk factors in dia-betic patients were aggregated,Meta-analysis was conducted by stata 1 1 .0 software.Results A total of 1 2 literatures were included in the study .The average rate of CAI in diabetic patients was 39.55% (22.12%-55.86%).The major infec-tions were respiratory system infection(40.74%),urinary tract infection(27.35%),tuberculosis(10.80%),skin and soft tissue infection(9.19%),and hepatobiliary system infection (5.57%).Stratified analysis on risk factors revealed that OR and OR95%CI of chronic complication,age,disease course,glycemic control,gender,type of diabetes,subtype of ketoac-idosis was 1.63(1.45,1.82),1.30(1.19,1.42),1.47(1.35,1.61),0.68(0.61,0.76),0.69(0.64,0.75),1.37 (1.13,1.66 )and 0.87(0.62,1.23),respectively.There was no publication bias and combined results were stable. Conclusion The main CAI in diabetic patients are respiratory system infection,urinary tract infection,tuberculo-sis,skin and soft tissue infection,and so on ;several factors,such as female,older age,long-term disease course, poor glycemic control,and complication,can contribute to the increase of CAI in diabetic patients.