An optical transceiver assembly, comprising: a first cavity, wherein the first cavity comprises at least two optical receivers (21, 22), and the at least two optical receivers are configured to receive light of different wavelengths, respectively; a second cavity, wherein the second cavity comprises at least two optical transmitters (31, 32), and the at least two optical transmitters are configured to emit light of different wavelengths, respectively; wavelengths of light received by the at least two optical receivers are different from wavelengths of light emitted by the at least two optical transmitters; wherein the first cavity and the second cavity are connected by using a common cavity wall; wavelength division multiplexers (41, 42, 43, 44), WDMs, wherein each optical receiver and each optical transmitter correspond to different ones of the wavelength division multiplexers (41, 42, 43, 44), WDMs, respectively; the WDMs corresponding to the optical receivers are configured to: separate, from light emitted from an optical fiber, light of a wavelength that can be received by the corresponding optical receiver, transmit the light to the corresponding optical receiver, and reflect light of the other wavelengths; and the WDMs corresponding to the optical transmitters are configured to: transmit light of a wavelength emitted by the corresponding optical transmitter, and reflect light of the other wavelengths emitted from the optical fiber; wherein the optical transceiver assembly further comprises an optical reflection component, configured to totally reflect the light transmitted or reflected from the WDMs; and lenses (61, 62, 63, 64) corresponding to each optical receiver and each optical transmitter, respectively, wherein the lenses corresponding to the optical receivers are disposed in the first cavity, and are configured to transmit, to the optical receivers, the light emitted from the WDMs corresponding to the optical receivers; and the lenses corresponding to the optical transmitters are disposed in the second cavity, and are configured to transmit, to the WDMs corresponding to the optical transmitters, the light emitted by the optical transmitters. a first cavity, wherein the first cavity comprises at least two optical receivers (21, 22), and the at least two optical receivers are configured to receive light of different wavelengths, respectively; a second cavity, wherein the second cavity comprises at least two optical transmitters (31, 32), and the at least two optical transmitters are configured to emit light of different wavelengths, respectively; wavelengths of light received by the at least two optical receivers are different from wavelengths of light emitted by the at least two optical transmitters; wherein the first cavity and the second cavity are connected by using a common cavity wall; wavelength division multiplexers (41, 42, 43, 44), WDMs, wherein each optical receiver and each optical transmitter correspond to different ones of the wavelength division multiplexers (41, 42, 43, 44), WDMs, respectively; the WDMs corresponding to the optical receivers are configured to: separate, from light emitted from an optical fiber, light of a wavelength that can be received by the corresponding optical receiver, transmit the light to the corresponding optical receiver, and reflect light of the other wavelengths; and the WDMs corresponding to the optical transmitters are configured to: transmit light of a wavelength emitted by the corresponding optical transmitter, and reflect light of the other wavelengths emitted from the optical fiber; wherein the optical transceiver assembly further comprises an optical reflection component, configured to totally reflect the light transmitted or reflected from the WDMs; and lenses (61, 62, 63, 64) corresponding to each optical receiver and each optical transmitter, respectively, wherein the lenses corresponding to the optical receivers are disposed in the first cavity, and are configured to transmit, to the optical receivers, the light emitted from the WDMs corresponding to the optical receivers; and the lenses corresponding to the optical transmitters are disposed in the second cavity, and are configured to transmit, to the WDMs corresponding to the optical transmitters, the light emitted by the optical transmitters.