Abstract: Wireless power transfer has the characteristics of no wiring, automation, and ease of maintenance, which can effectively solve the energy supply problem for the future large-scale application of artificial intelligence of things. Magnetic resonant coupling wireless power transfer technology has more balanced technical advantages in terms of spatial freedom and energy transfer efficiency, and has become a research hotspot in the field of wireless power transfer today, with broader application prospects. In this paper, the development history of magnetic resonant coupling wireless power transfer technology is reviewed, and the related background concepts are briefly summarized. A systematic review of recent works on magnetic resonant coupling wireless power transfer technology is carried out, and based on the design motivation and technical realization, the basic principles and implementation methods of the corresponding research are summarized in detail from the four perspectives of feedback communication, optimization scheduling, sensing application and radiation safety guarantee, providing an effective reference for subsequent research. Specifically, feedback communication works are categorized into two main types according to transmission mode, optimization scheduling works are classified into two main types based on system structure, and sensing applications are introduced from three main categories according to application scenario. Finally, based on the aforementioned works, the paper discusses areas for improvement in the current magnetic resonant coupling wireless power transfer technology and explores future research directions.