Adjustable wavelength division multiplexing and entangled photon pairing multiplexing and coding modulation device

The invention provides an adjustable wavelength division multiplexing and entangled photon pairing multiplexing and coded modulation device which comprises a shell and a first optical fiber penetrating into the shell from the outside, the first optical fiber fixing device, the light beam coupling/collimation module, the light beam shaping regulation and control module, the polarization control module, the adjustable circulator module, the multiple first spectrum processing modules P, the second spectrum processing module Q, the coding multiplexing control module and the like are located in the shell. The coding multiplexing control module performs linkage regulation and control on the plurality of first spectrum processing modules P, the second spectrum processing module Q, the adjustable circulator module and the like, thereby realizing fine regulation and control on multiplexing wavelength, multiplexing bandwidth and channel number, and operations of entangled photon pairing multiplexing, coding modulation,