Coating mold for surface processing of special material

The invention relates to the technical field of coating machining accessory devices, in particular to a coating die for surface machining of special materials, which comprises an upper die and a lower die, an upper die holder is slidably arranged on the upper die, a lower die holder is slidably arranged on the lower die, a plurality of semicircular grooves with gradually decreased inner diameters are arranged on the upper die holder at equal intervals, and the semicircular grooves are arranged in the lower die holder. A plurality of semicircular grooves with gradually-increased inner diameters are formed in the lower die base at equal intervals. According to the coating mold, the upper mold base and the lower mold base slide relatively, the semicircular grooves with different inner diameters are mutually adjusted and matched, the multiple replaceable coating cavities are formed in the single coating mold, the inner diameters of the coating cavities can be adjusted according to needs, the whole coating mold do