This paper elaborates the types,development trend and development history of gyroscopes and accelerometer,the accuracy,weight,volume,power consumption,advantages and disadvantages of laser,fiber-optic and MEMS inertial navigation are analyzed. Then the research status of fiber-optic inertial navigation at home and abroad is reviewed in detail,and the related products at home and abroad are compared and analyzed. The initial alignment,online calibration,temperature compensation and integrated navigation technologies of fiber-optic inertial navigation are studied and analyzed.