Methods We chose the active locations of MSM reasonably,and used capture-recapture method and multiplier method to estimate the size of MSM in a certain city of a province.

• 方法合理选择男男同性恋活动场所,应用捕获-再捕获和乘数法对某省某市同性恋人群进行规模估计,并应用层次分析法,估计该省其它部分地区男男同性恋人群的规模。