To observe the effect of phased written health education combined with healthy diet on the quality of life of patients after heart valve replacement.One hundred-thirty patients who underwent heart valve replacement surgery in our hospital from January 2018 to January 2020 were enrolled as the research subjects. They were randomly divided into study group (65 patients, phased written health education combined with health Diet) and control group (65 cases, routine health education). The drug compliance and the degree of anticoagulant drugs knowledge were compared between the two groups in the first and second stage rehabilitation and the recovery stage. The health behavior ability and quality of life at different phases were also observed.During the first and the second stage rehabilitation, and the recovery stage, the drug compliance of the study group was superior to that of the control group, with statistical significance (P < 0.05). Meanwhile, the knowledge of anticoagulant drugs in the study group was better than that in the control group, with statistical significance (P < 0.05). Before intervention, there was no significant difference in health behavior ability and quality of life between the two groups (P > 0.05). The healthy behavior ability of study group for each stage was superior to the control group, the difference was significant (P < 0.05). The healthy behavior ability and quality of life showed the same results with statistical significance (P < 0.05).The use of phased written health education combined with healthy diet in patients after heart valve replacement can effectively improve patients' medication compliance, anticoagulant drugs knowledge, healthy behavior ability and quality of life at different stages, and is worthy of clinical application.