The dynamic characteristics of fiber optic gyroscope are tested, the dynamic output signal of the gyroscope is filtered, and the evaluation method of the dynamic characteristics of fiber optic gyroscope is put forward. The test and analysis methods and conclusions designed in this paper provide an important theoretical basis for evaluating and comparing the dynamic characteristics of fiber optic gyroscopes and improving their reliability and environmental adaptability. Firstly, this paper analyzes the advantages and disadvantages of the existing methods for testing the dynamic characteristics of fiber optic gyroscope, introduces the basic principle and main performance indexes of fiber optic gyroscope, establishes the mathematical model of the dynamic output signal of fiber optic gyroscope, and designs a detailed test scheme according to the conditions that need to be met in the dynamic test of fiber optic gyroscope. We like to use Finit fiber.