The invention discloses a production process of a reinforced melamine facing medium density fiberboard. The production process comprises the following steps of S1, pretreating raw materials; S2, crushing the raw materials obtained in S1 and conveying the crushed raw materials to a stirring machine, spraying a flame retardant in the stirring process, wherein the additive amount of the flame retardant is 5%-15% of the absolute dry mass of the raw materials; S3, carrying out high-temperature heat treatment; S4, forming a medium density fiberboard; S5, placing a glass fiber net layer in a mold frame of the medium density fiberboard layer, spreading and prepressing; S6, preparing a fiberboard layer; and S7, pressing and pasting melamine glue-impregnated paper at high temperature on the upper surface of the fiberboard layer and the lower surface of the medium density fiberboard. According to the production process of the reinforced melamine facing medium density fiberboard, the medium density fiberboard, the glass fiber net layer and the fiberboard layer are adopted for bonding treatment, the melamine impregnated paper is added, and meanwhile, the raw materials are sprayed with the flameretardant during preparation, and high-temperature treatment is carried out, so that the flame-retardant effect can be effectively achieved, the preparation process is reasonable and simple, the costis low, the surface processing performance is good, and the method is suitable for industrial production.