The invention discloses a three-core coloring mold for optical cable production. The mold comprises a first ink pressure pipe, mold pressing nuts and first optical fiber coating holes, wherein the first ink pressure pipe is arranged on a main body, a second ink pressure pipe is arranged on one side of the first ink pressure pipe, and a third ink pressure pipe is arranged on the side, far away fromthe first ink pressure pipe, of the second ink pressure pipe; the mold pressing nuts are arranged on the front side and the rear side of the main body correspondingly; and the first optical fiber coating holes are formed in the mold pressing nuts, second optical fiber coating holes are arranged at one sides of the first optical fiber coating holes, and third optical fiber coating holes are arranged at one sides of the second optical fiber coating holes. According to the mold, a foundation is laid for integration production of coloring and plastic coating, the three-core one-furnace or six-core one-furnace is guaranteed, so that the equipment cost is greatly reduced; and the curing resources are fully utilized, and under the same curing power, the simultaneous curing of multiple optical fibers is realized, so that the energy is saved and the consumption is reduced.