High tibial osteotomy an osteotomy is an operation where a bone is cut and re-positioned . The aim of this study explores and developing postoperative nursing care standards for patients undergoing high tibial osteotomy surgery. Subject and methods: Descriptive exploratory research design was utilized. The study was carried out in the department of orthopedic surgery at Assiut University Hospital. The study sample of all available nurses working in orthopedic department and who are willing to participate in this study (30).Tools utilized for data collections were Nurse's questionnaire sheet, Observation nursing practice checklist sheet and post-operative basic competencies Opinionnaire sheet. Results showed the knowledge about standards of post operative interventions for high tibial osteotomy patients, more than half of nurses (53.3%) had good knowledge regarding standards of post operative interventions for high tibial osteotomy patients. Nurses showed inadequacy in their practice about standards of post operative interventions for high tibial osteotomy patients .majority of nurses agree with basic post-operative nursing care standards. Conclusion: Formulation of standards is the first step toward evaluating nursing care delivery. Recommendation: an In-service training program for nurses is important in orthopedic surgery department. Application of the nursing care standards for post-operative high tibial osteotomy patients.