刘瑞恒主持中央卫生行政期间,西医界内部“德日派”与“英美派”的矛盾步步激化。中央与地方卫生机构的组织与调整,使“英美派”在卫生行政中占绝对优势;他依赖美国进行的卫生资源整合与医学教育改革,使“德日派”与“英美派”矛盾公开化,进而引发口舌争锋;他整顿军医,打击日派势力,将两派关系推演至白热化。派系内斗不仅影响了刘瑞恒个人职业生涯,而且导致卫生行政处处遭遇阻梗,社会上医患纠纷陡增,学术交流之风消散,严重影响了西医在中国的发展。 Liu Ruiheng presided over the central health administration period, the Western medical community within the “German-Japanese school” and “British-American school” contradictions intensified step by step. The organization and readjustment of the central and local health agencies have made “Anglo-American faction ” an absolute advantage in health administration. He relies on the integration of health resources and medical education reform conducted by the United States so that the “German-Japanese faction” and the “Anglo-American Factionalism ”and open up conflicting demands. He has reorganized the military and cracked down on the Japanese forces and deduced the relations between the two factions to intensify. Faction infighting not only affected Liu Ruiheng personal career, but also led to the sanitation administration office suffered a stalemate, the community surge in doctors and patients, the wind of academic exchange dissipated, seriously affected the development of Western medicine in China.