Objective:To analyze the effect of rehabilitation nursing based on dynamic and static complementary balance theory in functional exercise of patients after total knee replacement.Methods:A simple random sampling was used to select 84 patients who underwent total knee arthroplasty in Lishui Municipal Central Hospital from June 2020 to June 2021. The patients were divided into observation group and control group with 42 cases each by random number table. The patients in the control group were given routine rehabilitation nursing before discharge, and the patients in the observation group were given rehabilitation nursing based on the dynamic and static complementary balance theory before discharge. At the time of discharge and one and three months after discharge, the functional exercise compliance (score of the Out-of-hospital Functional Rehabilitation Exercise Compliance Questionnaire), knee joint function score and balance ability score of the two groups of patients were compared, and the hospital stay and complication incidence of the two groups of patients within three months after discharge were recorded and compared.Results:Within three months after discharge, the scores of Out-of-hospital Functional Rehabilitation Exercise Compliance Questionnaire in the two groups decreased, knee joint function scores and balance ability scores of patients in the two groups increased, and the scores in the observation group were higher than those in the control group one and three months after discharge, with statistically significant differences ( P<0.05). The hospital stay of patients in the observation group was shorter than that in the control group, and the total incidence of complications within three months after discharge was lower than that in the control group, with statistically significant differences ( P<0.05) . Conclusions:Rehabilitation nursing based on the dynamic and static complementary balance theory can effectively promote the recovery of knee joint function of patients after total knee replacement, improve the compliance of patients with functional exercise, and reduce the occurrence of complications.