Based on the general theory of linear Chirped Bragg fiber grating, this paper discusses some parameters including different chirped values and quasi-gauss coupling function relating with the reflectivity coefficient dispersion compensation. The result shows that selecting larger chirped value and appropriate qusi-guass coupling function can improve the dispersion compensation while ensuring high reflectivity. The concept of "figure of merit" in the microwave field is introduced to quantize the equalizing power of the dispersion compensator.