Based on the analysis of the effects of scientific talent accumulation and knowledge spillover, this article studies the subject of knowledge spillover, the spillover receiver, the content of spillover and the way of spillover under the scientific talent accumulation. It argues that i) scientific talents act double roles of the subject of knowledge spillover and the spillover receiver; ii) the content of spillover has obvious characteristics of being broad, momentary, centralized and dynamic; iii) the way of the implicit knowledge spillover exhibits its particularity.