Fluxgate is a type of high-precision magnetic sensor for measuring DC or low-frequency alternating vector magnetic field. After more than 80 years of development，its comprehensive performance has been improved continuously. In addition to the common probe structure，many novel fluxgate probe structures have emerged under the continuous innovation of domestic and foreign researchers. With the development of magnetic core materials and electronic technology，the traditional fluxgate sensor still has a great potential for further development. In the future， it will be improved with higher sensitivity，lower power consumption，smaller volume and other trends，and enter more application fields. First，this paper briefly analyzed the core materials，introduced the latest research progress， and summarized and classified the structures of fluxgate circuit. Then，the research levels at home and abroad were discussed respectively and the research gap was pointed out accordingly. Finally，several important applications of fluxgate sensor in marine field were introduced.
