Abstract: The paper studies the knowledge diffusion network and diffusion path among different disciplines of humanities and social sciences, in the hope of providing reference for future interdisciplinary research and inter-disciplinary development. It measures the position of different subjects in the co-citation network based on group centrality and knowledge diffusion status in the cited network, and the results show that the Marxism has strong knowledge diffusion ability to economics, psychology to pedagogy, and philosophy to politics.

Key words: Group centrality, Inter-discipline, Knowledge diffusion