Freshwater pulmonate (Radix swinhoei) is widespread and abundant in many eutrophic water bodies in Asia. Here, we conducted a one-year survey of R. swinhoei with monthly collections to measure the life history traits (life span and growth), annual secondary production and population size structure of R. swinhoei in nearshore regions of Lake Dianchi, a typic hypereutrophic plateau lake in Southwest China.