With the urgent demand for dynamic wireless charging capabilities with mobile loads, dynamic wireless power transfer(DWPT) has gradually entered people′s field of vision and become a new research hotspot. The article firstly compares the main structure of the existing dynamic wireless power transfer system and its advantages and disadvantages. Secondly, the key technologies of DWPT are discussed from the aspects of high frequency inverter circuit, compensation network, electromagnetic coupling mechanism, coil array switching method and electromagnetic compatibility. Finally, combining the research results of scholars at domestic and abroad in recent years, it summarizes the progress of the engineering application of dynamic wireless power transfer, and the future development trend of dynamic wireless power transfer is predicted, which shows that dynamic wireless power transfer has broad application prospects in the fields of AGV, substation intelligent inspection robot, mobile electromechanical equipment, rail transit and electric vehicle.