Abstract: The tissue structure of the reproductive system of Hemifusus ternatanus was studied by anatomical and histological techniques,and the shape of its reproductive system was described.The features are discussed in its reproductive system.The results showed that:the male reproductive system of H.ternatanus consists of the testis,vas deferens collecting duct,seminal vesicle,vas deferens,seminal vesicles,and the transfer device; the female reproductive system of H.ternatanus is composed of the ovaries,the fallopian collecting duct,albumen gland,gland wrapped around the eggs,black gland,transfer capsule,the vagina and proleg mouth.Transfer device is a unique structure of H.ternatanus,which has not been reported in other gastropods.The proleg mouth only disappeared in the female,and is the only morphology symbol that can distinguish male and female.The protein gland secretes strong eosinophilic material in reproductive season,the gland wrapped around the eggs secretes strong basophilic substances.The black gland was first discovered in H.ternatanu, and its specific functions should be studied further.