The present invention provides a soliton optical frequency comb generation device and an operation method thereof. The device comprises an adjustable pulse laser, a first connection optical fiber, anoptical amplifier, a second connection optical fiber, a polarization controller, a third connection optical fiber, a first circulator, an assistant test output optical fiber, a fourth connection optical fiber, a ceramic ferrule microcavity, single-layer grapheme, an output optical fiber, a first C-type ceramic tube and a second C-type ceramic tube. The device employs the single-layer grapheme andthe FP microcavity structure to generate a soliton optical frequency comb with 10GHz frequency comb intervals in a condition without tuning of the pump laser frequency, and therefore, the soliton optical frequency comb generation device and the operation method thereof are high in integration level, low in power consumption, simple and convenient to operate and good in output result repeatability.