Abstract: Objective  To investigate the species and distribution of mollusca with medical importance in Weifang， Shandong Province.  Methods  Species identification and quantitative statistics analysis was studied based on field-collected snails from the districts of Weifang， Shouguang， Anqiu and Changyi， Shandong Province.  Results  A total of 1 791 medical mollusca specimens were collected， belonging to two Classes, 9 families and 14 species. Some important species were discovered including Parafossarulus striatulus（383）， Alocinma longicornis（34）， Galba pervia （63）， Radix swinhoei（137）， R. auricularia（95）， Physa acuta（677） and Hippeutis cantori（22）. The dominant species were P. acuta and P. striatulus.  Conclusion  There remains a higher diversity of medical mollusca in Weifang, Shandong Province.

Key words: Medical mollusca, Species identification, Parasite, Weifang