Optical module and laser wavelength shift adjusting method and device of optical module

The invention discloses an optical module and a laser wavelength shift adjusting method and device of the optical module, and belongs to the field of optical communication. A wavelength selector allows light of the first wavelength in a first light beam to pass and reflects light not of the first wavelength in the first light beam, and thus, light not of the first wavelength is separated from the first light beam. A processor obtains the optical power of the light not of the first wavelength via a second monitoring detector, obtains the optical power of a second light beam via a first monitoring detector, and obtains the proportion of the light not of the first wavelength in the first light beam according to the optical power of the first light not of the first wavelength and the optical power of the second light beam. The light not of the first wavelength is light of the wavelength shift. According to the proportion, the processor can adjust the temperature of a laser via a temperature controller, and thus overcome the wavelength shift of the laser.