The invention relates to a bright caulking compound. The bright caulking compound is prepared from the following raw materials by weight: 35 to 45 parts of common white Portland cement, 20 to 40 parts of quartz powder, 5 to 10 parts of light calcium, 1 to 3 parts of starch, 10 to 30 parts of heavy calcium carbonate powder, 0.15 to 0.25 part of hydroxypropyl methyl cellulose, 5 to 10 parts of pure acrylic glue powder, 0.08 to 0.1 part of a polycarboxylate superplasticizer, 0.1 to 0.3 part of an antifoaming agent, 0.2 to 0.3 part of an organosilicon water repellent, 0.1 to 0.4 part of aluminum-magnesium silicate, 0.4 to 0.6 part of a brightener, 1.5 to 3 parts of pigment, 0.3 to 0.5 part of a dispersant and 0.1 to 0.3 part of cellulosic fiber. According to the invention, since various properties of the caulking compound are improved through addition of proper additives, disadvantages of traditional cement-based caulking compounds are overcome, problems of a reactive resin type caulking compound are perfectly solved, the caulking compound disclosed in the invention has excellent resistance to corrosion, mildew, permeation, water, scrubbing, wear and contamination, excellent shrinkage deformation capability and other excellent properties, cost is saved, and production and construction steps are simplified.