Moral conflict is an importantly further reason why AIDS prevention and control are faced with many difficult problems in China.The moral conflict in AIDS prevention and control mainly focuses on three types: The first one is normative conflict,including governmental intervention and civil autonomy,scarce resources and fair distribution,and strategy of tolerance and moral standards.The second one is factual conflict,including differences in strategy of propaganda and education,ethical nature of drug addicts,difficult problems of sex workers’ management,and the difficult situation of voluntary counseling and testing.The last one is subjective conflict,including "moral majority" and the rights of minority,social supporting and discriminating,and subject trouble of departmental cooperation.Moral conflict often makes AIDS prevention and control in dilemma.To solve these conflicts,we must distinguish the two different conflicts,stick to the correspondingly moral principle,strengthen responsible ethics and carry out the strategy of tolerance.