Objective　To investigate the effect of the evaluation on teaching hospitals affiliat-ed to medical colleges in Guangdong province. Methods　Questionnaire and on on-the-spot investi-gation was conducted among 18 teaching hospitals which owned the accreditation for 2-3 years based on Guangdong provincial teaching hospital accreditation indicator system 2008 modified version. Contents of investigation included general situation， teaching condition， management and implementa-tion of teaching activities as well as medical staffs' comments and suggestions for the teaching work. SPSS 13.0 software was used for frequency analysis. Results　The general situation，teaching condi-tion，management and implementation of teaching activities were improved to varying degrees after the evaluation according to results of the questionnaire. 90.0%（54/90） people thought that the overall scale of the hospital was expanded and 5.0%（3/60） people thought that the overall scale of the hos-pital was obviously reduced or marinated the original level. 11.6%（7/60） and 88.3%（53/60） people thought that medical quality of the hospital was improved or obviously improved. 60.0%（36/60） people thought that educational occupancy of the hospital was improved while 5.0%（3/60） people thought that it was unsatisfactory. 83.3%（50/60） people thought that teaching mold and infrastructures were improved while 10.0%（6/60） people thought that it was unsatisfactory. 95.0%（57/60） people thought that teaching management was improved. Due to the lack of incentives and support in teaching work， management of teaching was loose. Conclusions　The teaching work of t hospitals affiliated to medical colleges in Guangdong province do persevere basically and achieve desired purposes.