The sperm proteins were extracted from the fresh spermatic fluid of male gynogenetic silver crucian carp(Carassius auratus gibelio),and various fractions were collected,the fractions include sperm plasma,sperm head membrane,flagella,and demembranated sperm head,etc.in order to reveal the roles of the homologous sperm head membrane proteins to allogenetic fertilization in gynogenetic silver crucian carp.The soluble protein components of the sperm head membrane were,mixed with sperms of purice red carp(Cyprinus carpio var vuyuanensis) and then this cocktail was fertilized to eggs of silver crucian carp.The obtained results show that the hatching ratio of the experimental group is lower than that of the control group.Furthermore,during the filial generation breeding,two special individuals which grow faster were found,the special individuals have the similar phenotype and genotype to their father.To a certain degree,sperm head membrane maybe is the key factor to the androgenesis of the gynogenetic silver crucian carp eggs.