Abstract: Driven by stringent requirements for lightweight design, high-density integration, and low loss in integrally formed inductors for new energy vehicles and 5G communications, FeSiCr magnetic powder cores have emerged as key magnetic materials. These cores are favored for their high saturation magnetic induction, excellent frequency stability, and corrosion resistance. This paper systematically reviews research progress in the preparation of high-performance FeSiCr magnetic powder cores, focusing on the fundamental principles, process optimization methods, and performance regulation mechanisms of powder pretreatment and coating technologies. Furthermore, it summarizes the regulation rules and key influencing factors governing four critical properties: effective permeability, magnetic loss, saturation magnetic induction, and direct current bias characteristics. Although current research has shifted from single-process optimization to multi-parameter comprehensive regulation, challenges remain in precisely controlling powder microstructure, balancing insulation with magnetic properties, and adapting to extreme operating conditions. Finally, this paper analyzes existing bottlenecks in the preparation technology of FeSiCr magnetic powder cores and outlines future development directions, including multi-scale comprehensive regulation, the development of new functional materials, and intelligent production, thereby providing a reference for their industrial application in high-frequency and high-power integrally formed inductors.