李大钊是马叙伦早期相识的共产党人之一.“5·4”运动时期他们都在北大任教,由于“5·4”运动,特别是“5·4”以后的共同斗争,关系更趋密切.李大钊和马叙伦一起领导了1920年北京的第二次索薪和争取教育经费独立的斗争,马叙伦和李大钊分别被推选为北京国立大专以上八校的教职员联合会主席和书记.在著名的“六·三”事件中,李大钊、马叙伦和北大教授沈士远一同走在游行请愿队伍的最前面.在新 Li Dazhao was one of the early Communists known by Ma Xulun. “During the April 4 Movement, both of them taught at Peking University and became closer due to the” 5.4 “campaign and especially the common struggle after” 5.4. “Li Dazhao Together with Ma Xulun, he led the second pay-salaries and the struggle for independence of education funding in Beijing in 1920. Ma Xulun and Li Dazhao were elected respectively as the chairpersons and secretaries of the staff associations of the above eight schools in Beijing. In the famous ” In the incident, Li Dazhao, Ma Xulun and Peking University professor Shen Shiyuan walked together at the front of the parade petition team.