In this paper, the wavelength and the output power of the 3×3 channel micro-ring resonator under the non-linear function are studied and analyzed in the study of the theory model of the micro-ring-based optical communication device, and the influence of the nonlinear optical effect is not taken into account. The coupling theory formula of the micro-ring is derived, and the change of the permeability ratio of the micro-ring with the output light intensity is given. In this paper, the relationship between the through-through ratio and the wavelength of the micro-ring is constructed by simulation. The simulation results show that the effect of the phosphating solution on the non-linear effect of silicon nitride is more obvious and the string is more obvious. The disturbance is also large. The result of the final analysis is that the best working wavelength of the micro-ring of the silicon nitride material is in the vicinity of 0.7 μm, and the optimum working wavelength of the micro-ring for the phosphating material is 1.4 μm.