An optical interconnection device (915) comprises a first vertically coupled cavity (100), a first optical waveguide (102), and a second optical waveguide (103). The first vertically coupled cavity (100) comprises N identical micro resonant cavities stacked at equal intervals. The center of each micro resonant cavity is located in a first straight line perpendicular to a plane where the micro resonant cavity is located. The first optical waveguide (102) and a first micro resonant cavity (11) are located in the same plane, and the second optical waveguide (103) and a second micro resonant cavity (13) are located in the same plane. The first optical waveguide (102) is an input optical waveguide, and the second optical waveguide (103) is a first output optical waveguide. An optical signal with a first resonant wavelength in the first optical waveguide (102) passes through the first vertically coupled cavity (100), and enters the second optical waveguide (103). The optical interconnection device (915) enables the optical signal with the first resonant wavelength in the first optical waveguide (102) to pass through the first vertically coupled cavity (100), and then to be coupled into the second optical waveguide (103). In this manner, the optical interconnection device (915) can be used to implement sharing of optical signals between different layers.