The invention relates to a production process of a galvanized steel coil, comprising the following steps: S1, successively uncoiling the cold-rolled hard steel coil, cutting the head and tail, and welding; S2, preparing a degreasing solution, and sequentially disposing the steel coil processed by S1 Immersion in degreasing solution, brushing with rollers, drying with hot air, and treatment with an inlet looper; S3, annealing the steel coil obtained in S1; S4, putting the annealed steel coil into a zinc pot, soaking for 4-5s, and then blowing through an air knife in turn Sweep, cool, dry with hot air, and smooth to obtain a galvanized steel coil; S5, heat the galvanized steel coil, take it out, suck passivation droplets on the surface of the galvanized steel coil with a straw, and dry it; S6, after processing S5 The steel coil obtained in S6 is treated with anti-fingerprint coating, and oiled after being exported through the looper; S7, the steel coil obtained in S6 is slit, coiled, uncoiled, and packaged. The production process of the galvanized steel coil in the present invention can effectively remove pollutants such as dust and iron powder firmly adhered to the surface of the steel coil, which is beneficial to improve the quality of the galvanized steel coil, thereby prolonging the galvanized steel coil. The service life of the roll.