Objective:To explore the influence of nurses ' professional identity and missed nursing in Oncology Department on nurses ' team cooperation, and whether nurses ' participation in enhanced recovery after surgery (ERAS) can regulate nurses ' team cooperation. Methods:From November to December 2021, 587 nurses from 34 surgical wards of the Affiliated Cancer Hospital of Zhengzhou University (Henan Cancer Hospital) were selected as the study subject by convenience sampling method. The nurses were investigated with the General Information Questionnaire, Occupational Identity Scale (OIS) , Oncology Missed Nursing Care Feedback Scale, and Nursing Teamwork Survey (NTS) . A total of 587 questionnaires were distributed, and 583 valid questionnaires were recovered, with a valid recovery rate of 99.32% (583/587) .Results:Among 583 nurses in Oncology Department, the scores of NTS, OIS and Oncology Missed Nursing Care Feedback Scale were (126.86±15.62) , (123.26±22.67) and (121.24±52.79) respectively. The total score of NTS of nurses in Oncology Department was positively correlated with the total score of OIS and the total score of Oncology Missed Nursing Care Feedback Scale ( P<0.01) . Missed nursing played a part of mediating effect among professional identity and team leadership, trust and support, and team mental, and the direct effect was greater than the indirect effect. Conclusions:The professional identity of nurses in Oncology Department directly and positively affects the team leadership, trust and support, and team mental in nurse team cooperation, and the missed nursing has a mediating effect. The degree of nurses ' participation in ERAS has a moderating effect on nurse team cooperation.