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In this paper, we analyzed the reflective properties of optical reflector based on circular coupled microring resonators using the transfer matrix method. The reflective spectrum changes greatly for different inter-resonator coupling due to constructive and destructive interference for different wavelength. Coupled resonator induced transparency occurred when all the resonators are weakly coupled with each other. When the ring-ring is symmetric coupling, single narrow reflection peak can be obtained while single/multiple-peaks box-like profiles would be produced for asymmetric coupling. Optimization of the ring-bus and ring-ring coupling coefficients to achieve different reflective spectrum has been done to provide a design guideline for this novel structure.