The invention relates to a color card hook coding machine comprising a supporting mechanism. A rotating disc is arranged on the supporting mechanism, and a plurality of movable bottom molds are arranged on the rotating disc; an automatic color card conveying device, a cold cutting device, a hot-cutting coding device and an unloading device are sequentially arranged along the rotating disc in the clockwise or counterclockwise direction; the automatic color card conveying device comprises a fixing frame, a plurality of positioning columns, a first suction cup, a fifth air cylinder and a sixth air cylinder; the fixing frame is erected on the supporting mechanism, a hollow position matched with color cards is formed in the middle of the fixing frame, and the multiple positioning columns are vertically arranged on the fixing frame around the hollow position; and the first suction cup is arranged on the lower portion of the hollow position, the fifth air cylinder is in driving connection with the first suction cup, and the sixth air cylinder is in driving connection with a whole composed of the first suction cup and the fifth air cylinder. Mechanical automatic conveying is achieved by arranging the automatic color card conveying device, the labor intensity of operators is reduced, and the unmanned operation mode is achieved.