Objective To know the situation of reproductive health and knowledge of STD among unmarried female migrants.Method Randomized and cluster sampling method were adopted

and 215 unmarried female migrants were investigated in questionnaires of unity structure on reproductive health situation and knowledge of STD and reproductive health.Results The Incidence of premarital sexual behavior which is 48.84% has correlation with age（χ2=13.040

p=0.001）.The understanding rate to gynecologic common symptoms is 59.07%

which related to age and education（H=39.656

p=0.000;H=7.512

p=0.006）.The incidence of gynecologic discomfort which is 33.49% has relevance with score on gynecologic symptoms（χ2=15.602

p=0.000）.The understanding rate to STD was 92.58%

which related to age（H=15.935

p=0.000）.The score of prevention on STD has relevance with education（H=7.457

p=0.006）.Conclusion Knowledge of reproductive health of unmarried female migrants is very deficiency.We should develop comprehensive education to improve their reproductive health statues.