本文论述了当前在实施水产养殖品种更新工程中，有关新品种开发与老品种提纯复壮、国内开发与国外引进、产量与质量、开发与保护、原种与良种等几个关系问题对指导水产养殖品种更新，搞好养殖品种结构调整，提高养殖业的经济效益有一定的指导作用。“,”In this paper the author expounds some problems, including the exploitation of new species and purification of old species, exploitation at home and import from other countries, pro-duction and quality,exploitation and protection,original species and artificial breeding,and so on. It is helpful to promote the updating of aquaculture species,better the stmcture of cultured species and raise the economic benefits of aquaculture industry.