The invention provides a two-component epoxy decorating sealant, comprising component A and component B. The component A comprises, by weight: 70-90 parts of first epoxy resin, 0-7 parts of glycidyl ether type diluent, 1-5 parts of a coupling agent, 3-7 parts of a first thixotropic agent, 0.1-0.3 part of a yellowing aid, and 0.1-0.3 part of a defoaming agent; the component B comprises 20-25 parts of an alicyclic curing agent, 20-30 parts of second epoxy resin, 25-30 parts of benzyl alcohol diluent, 3-6 parts of an accelerant, 3-7 parts of a second thixotropic agent, and 5-10 parts of a pigment. After being constructed and cured, the two-component epoxy decorating sealant attaches tightly to ceramic tiles, and water and dust never enter a gap to cause mold or leakage. In addition, colloid of the decorating sealant of the invention never flows or sags during construction, construction is facilitated, and construction efficiency is improved. The invention also provides a preparation method of the two-component epoxy decorating sealant.