为了解 7城市铁路中学女生月经初潮年龄和性心理行为状况 ,采用“健康教育调查表”对 7市铁路中学 2 44 7名女生进行调查。结果显示 ,7市女生月经初潮平均年龄为 12 .47～ 13.40岁 ,其中以广州市最早 ,哈尔滨市最晚。手淫、早恋和性冲动发生率 ,不同城市之间有显著性差异。结论 :近 10年来 ,女生初潮年龄明显提前 ,青少年需要适时接受性教育 In order to understand the age of menarche and psychological behavior of girls in urban railroads in 7 cities, a questionnaire of health education was used to survey 2 447 girls in 7 railway middle schools. The results showed that the average age of menarche of girls in 7 cities was 12.47 ~ 13.40 years, of which Guangzhou was the earliest and Harbin was the latest. Masturbation, puppy love and the incidence of sexual impulses, there are significant differences between cities. Conclusion: In the recent 10 years, the age of girls is significantly earlier than menopause, adolescents need timely education