The invention discloses an all-optical clock extraction device based on the double-injection locking technology, and relates to the field of optical fiber communication. The all-optical clock extraction device comprises a first injection locking unit, a second injection locking unit and an adjustable filter. A signal is first input into the first injection locking unit, an optimal injection effectis obtained by adjusting a polarization controller, the signal is input into a laser via a second port of an optical circulator, and a locked optical field is obtained under the action of injection locking; the optical field is amplified by an optical amplifier to obtain high-power pumping light, a cascaded four-wave mixing process is achieved in a nonlinear micro-ring by using the parametric oscillation effect, and a second injection locking effect is achieved; and an adjacent frequency spectrum component is obtained from a cascaded four-wave mixing product via the adjustable filter, and a high-quality optical clock with an adjustable wavelength is obtained. Compared with the existing clock extraction device, the all-optical clock extraction device disclosed by the invention utilizes thelaser and the nonlinear micro-ring to realize twice injection locking, can directly perform clock extraction on a high-spectral efficiency signal with a non-return-to-zero code modulation format, thereby reducing the complexity and the cost of signal processing and expanding the applicability of the type of devices.