The invention discloses a seal marking machine. The machine comprises a body; the body comprises a bottom plate, a pressing plate and a magnetic attraction structure, wherein the bottom plate is usedfor placing a carrier and a seal, the pressing plate is matched with the bottom plate to press the carrier and the seal, and the magnetic attraction structure is used for limiting the transverse relative movement of the pressing plate and the bottom plate; and the upper surface of the bottom plate is provided with a working space for placing the carrier and the seal. According to the machine, theseal and carrier are pressed tightly through the seal and the carrier are tightly pressed by the pressing plate and the bottom plate so as to mark a pattern on the carrier, and the magnetic attractionstructure is arranged, so that the transverse movement of the pressing plate relative to the bottom plate is limited; and meanwhile, the pressing plate and an elastic telescopic structure can horizontally move downwards in the pressing process, so that the seal fixed on the pressing plate keeps the accurate positioning of the bottom plate, the seal can be repeatedly marked at the same position onthe carrier, meanwhile, the machine is adapted to the seals with different thicknesses, the seal is stressed uniformly, the printed patterns are complete and uniform, and the pattern is more attractive; and the machine is simple in structure, small in size, easy to operate, convenient to carry, low in manufacturing cost and suitable for any people.