Focusing on the three major problems of the weak network security protection system of the traditional power monitoring system, the untimely perception of security threat monitoring, and the insufficient ability to trace the source of abnormal attacks, this paper combines the development needs of the new power system and the actual operation of Xinjiang power grid to improve the three-dimensional security protection technology of the power monitoring system from three aspects: full asset three-dimensional security protection, real-time monitoring of multi-source heterogeneous equipment, and multi link tracing of network attacks, The real-time monitoring response capability of multi-source equipment, the traceability and blocking capability of network attack multi link tracing, comprehensively improve the real-time monitoring, accurate traceability and blocking, and defense in depth capabilities of the power monitoring system, and ensure the safe and stable operation of the power grid through theoretical algorithm attack, intelligent tool development, and large-scale promotion and application.