The utility model relates to a code printing device of a zinc ingot product that is composed of a cylinder driving mechanism, a printing mechanism, and an electrical control system. The cylinder driving mechanism comprises a cylinder support (6) connected to a refined zinc linear ingot casting set rack, a cylinder support seat installed at the lower portion of the cylinder support, and a cylinder (5) connected with the cylinder support seat by a pin roll. The printing mechanism includes a printing mechanism support (4) installed at the upper portion of the cylinder support, a printing shaft (9) installed on the printing mechanism support, oil bearings (8) installed at two ends of the printing shaft, a bracket (3) arranged above the cylinder, a set of split type printing cantilevers (2) arranged in parallel, and steel figures respectively installed at the bottoms of the front ends of all the printing cantilevers (2), wherein the printing cantilevers (2) are arranged on the bracket horizontally and the tail ends thereof are sleeved on the printing shaft. Besides, a solenoid directional valve of the cylinder is electrically connected with the electrical control system. According to the utility model, a complete zinc ingot product code can be printed clearly on a zinc ingot product with an uneven surface.