The invention discloses animal environmental-friendly solid glue. The animal environmental-friendly solid glue comprises 10.0% to 70.0% of water, 1.0% to 10.0% of glycerol, 1.0% to 6.0% of propylene glycol, 20.0% to 50.0% of animal glue, 1.0% to 10.0% of a polyhydroxyl material, 0.01% to 0.5% of a catalyst, 1.0% to 10.0% of higher fatty acid, 0.5% to 5.0% of caustic soda flakes, 0% to 0.5% of a defoamer, 0.1% to 0.6% of an antioxidant and 0.1% to 0.5% of a preservative. A preparation method of the animal environmental-friendly solid glue comprises modifying animal glue to obtain base glue, adding the base glue, glycerol, propylene glycol and defoamer into a reactor, heating the materials to 60-80 DEG C, adding higher fatty acid into the materials, then adding the antioxidant and preservative into the materials, heating the materials to 75 to 80 DEG C, carrying out standing defoaming, discharging the defoamed materials, carrying out loading and carrying out cooling to obtain the solid glue. The animal environmental-friendly solid glue has good bonding performances, a fast drying rate and is environmentally friendly.