The invention discloses a gypsum jade-imitating product including, by weight, 7-9 parts of [alpha]-gypsum, 1-3 parts of gypsum crystal whiskers, 0.2-0.4 parts of silicon sol, and 0.01-0.02 parts of gypsum defoamer. The invention also provides a preparation method of the gypsum jade-imitating product, which includes steps of: manufacturing a mold, preparing a pour-casting material, performing pour-casting shaping, and performing wax-dipping and polishing treatment in later period. In the invention, according to a proper ratio, the [alpha]-gypsum, gypsum crystal whiskers, silicon sol and gypsumdefoamer are mixed with addition of deionized water to obtain the pour-casting material, which is then subjected to tests; according to test results, comprehensive analysis is carried out to obtain the raw material formula, so that the gypsum jade-imitating product has the reasonable raw material formula. Finally, the gypsum jade-imitating product has fine and solid texture, is high in strength and toughness, has a moist color and high glossiness, and has the texture of jade.