The nematic liquid crystal is an excellent non-local nonlinear medium for the study of spatial optical solitons. In order to achieve a flexible modulation of the deflection of spatial optical solitons in nematic liquid crystals, the structure of a liquid crystal cell with a comb-shaped electrode structure is designed. Applying an electric field to the liquid crystal cell with customized electrode structure enables modulation of the nematic liquid crystal within the periodic array, thus enabling controlled deflection of the nematicon and nematicon pairs. The incident laser beam can be deflected at different angles in different orientation ranges. When the beam is incident in a liquid crystal cell with a customized electrode width of 910 μm, the deflection of the beam can be adjusted within a range of 60° by changing the incident position. Various combinations of deflections can be formed by two laser beams incident at different positions. By varying the angle of incidence, a non-linear total reflection of the nematicon pairs at the interface can be observed. Furthermore, the width of the customized stripe electrode is changed to 300 μm, the nematicon pairs achieves a switch parallel transmission to mutual convergence and divergence. These methods of modulation nematicons deflection can play an important role in all optical circuit and optical communications.