Provided is a noise reduction green belt constructed with photonic crystal, the green belt is constructed with a certain amount of trees planted according to a special array approach, and the array constitutes a definite photonic crystal structure. In the noise reduction green belt constructed with photonic crystal, the diffuser (1) is of green grass and trees, and the base (2) is air. The special array is a rectangular shape structure, and arranged in parallel by order using 2n rows of trees, the n rows of mutually parallel trees form a group, an empty row space of trees is left between two groups in n rows of trees, and a rectangular middle cavity (3) is formed, wherein n is 2-5. The said certain amount is 32-180. Crystal lattice coefficients are counted as coefficients of two type, three type, four type, and five type. The hollow cavity design effectively captures incident noise, reduces the out leakage of noise, thus strengthens sound insulation and noise reduction ability; the invention adopts grass and trees as the diffuser, to guarantee the function of green standardization and beautification, air purification, environment protection and energy saving; using air as the base can guarantee the smooth circulation of the air.