Method for removing makes after mold welding

The invention discloses a method for removing marks after mold welding, and relates to the technical field of mold machining. The method comprises the following steps that S1, a welded mold is fixed, and then the positions, where are required to be polished and provided with the marks, of the mold are cleaned; S2, heating tools such as acetylene oxygen flame, laser quenching and the like are used for preheating; S3, a prepared mark mirror surface agent is sprayed on the positions with the marks, and the sprayed mark mirror surface agent is uniformly smeared; and S4, then a polishing device is started, the positions, coated with the mark mirror surface agent, of the mold are ground and polished again, the mark mirror surface agent eliminates the marks in the polishing process, and the chromatic aberration is avoided. The mark mirror surface agent is sprayed on the mold surface with the marks, then polishing is performed again, the polished mold surface does not generate the chromatic aberration, and the weldin