Based on the study of the generation of single optical vortex by the diffraction of optical wedge, an optical vortex array generation method was proposed. The diffraction of optical array by the rectangular optical wedge array was used to generate vortex array in the proposed method. If the spacing between adjacent beams in the direction parallelled to the wedge edge is equal to an integer times of the beam diameter, the beam array irradiation on the rectangular optical wedge array will produce vortex array. Then simulation was implemented for the verification of the feasibility. The wedge array was fabricated practically by the ultra-precision machine with integrated processing method.As the spatial light modulator can adjust beam array fast and flexibly, the experimental system was established, in which the spatial light modulator was used to generate the desired beam array by Dammam grating diffraction. The regulation of basic unit of Dammam grating mask pattern on beam array was researched in order to match the beam array and wedge array. The beam array with adjustable structure was obtained finally.The optical vortex array with same topological charge was generated successfully. The experimental and the simulative results have good agreement, which proved that the optical wedge array can generate vortex array effectively.