Objectives:To evaluate the effect of health education on prevention of HIV /AIDS among mi-grant workers and provide scientific evidences for prevention of HIV /AIDS.Methods:Migrant workers from three electronic factories received health education about HIV /AIDS.A questionnaire survey about HIV /AIDS was con-ducted by migrant workers before and after health education in order to assess the effect.Results:770 individuals participated in the investigation before health education.The awareness rate of HIV /AIDS -related knowledge was 22.0% -88.7% and awareness rate of policies about HIV /AIDS was 25.3% -36.2%.People who were willing to contact with HIV infected persons or help them accounted for 32.7% and 28.8% respectively.738 individuals were investigated after health education.The knowledge and attitude towards HIV /AIDS have improved among the target population and awareness rate of HIV /AIDS -related knowledge reached to 69.4% -93.2%.The difference of sex behaviors with workers or regular sex partners among the respondents was not statistically significant,but the usage rate of condoms increased,with statistically significant difference.Conclusion:The effect of health education to im-prove knowledge,attitude,and behavior towards HIV /AIDS for migrant workers is significant and health education plays a vital role on prevention of HIV /AIDS and reduction of its social harm.%目的：探索健康教育对外来务工人员预防艾滋病的效果，为开展流动人口预防艾滋病工作提供科学依据。方法：对成都市3家电子厂外来务工人员进行预防艾滋病健康教育，干预前后使用相同问卷评价健康教育效果。结果：干预前调查770人，传播艾滋病相关知识的知晓率为22．0％～88．7％，国家政策 为25．3％～36．2％，对艾滋病感染者持积极态度者为32．7％、28．8％。干预后调查738人，外来员工对艾滋病的知识态度改善，知晓率为69．4％～93．2％。目标人群与商业性服务者或者固定性伴侣发生性行为变化不显著，但安全套的使用率升高，差异显著。结论：健康教育对外来务工人员艾滋病知识、态度、行为干预效果明显，对预防艾滋病及降低其社会危害具有重要的意义。
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