Abstract: The topological charge polarization order of the cylindrical vector beam (CVB) can be defined as the repeat number of the 360° polarization state changes along the azimuth axis, and the direction of polarization rotation is indicated with the symbol.Dammam grating was proposed as the method to detect CAB with different topological charges. Q-plate processing with almost pure phase modulation and no relation with polarization was used in Dammam grating. The CVB model with different topological charges or same topological charge but with opposite signs could be separated by adding a quarter wave plate and a polarizer. The consistency between the experiment results and the theoretical prediction is obtained to illuminate the feasibility of the scheme.