Abstract: Objective To investigate the effects of peer education system on postoperative recovery,postoperative daily exercise and life quality of patients with breast cancer,and to determine its effect. Methods Altogether 80 patients underwent breast cancer surgery in Linhai First People's Hospital from June,2014 to May,2015 were selected as study subject and were randomly divided into two groups.Patients in observation group were given peer education system,and patients in control group were given routine health education.The functional exercise compliance situation,daily activities,and complications of two groups were compared. Results The functional exercise compliance situation of observation group was significantly higher than that of control group,the compliance rate of observation group was 92.5%,the compliance rate of control group was 67.5%,and the difference was statistically significant (P<0.05).The brushing,dressing,eating and combing hair ability of observation group were significantly higher than those of control group,and there was significant difference between the two groups (P<0.05).Four patients in observation group had flap necrosis (10.0%),three patients in control group had flap necrosis (7.5%);three patients in observation group had flap necrosis (7.5%),five patients in control group had subcutaneous fluid (12.5%),and there were no significant differences in the flaps necrosis and subcutaneous fluid between the two groups (P>0.05).Four patients in observation group had upper extremity edema (10.0%),17 patients in control group had upper extremity edema (42.5%),and the upper extremity edema rate of observation group was significant lower than that of control group.Therefore,there were significant differences between two groups (P<0.05). Conclusion Peer education system could effectively improve the functional exercise compliance rate of patients with breast cancer after operation,improve some basic daily activities,and reduce edema of upper limbs incidence rate,worthy of clinical popularization.