The invention provides a preservation method for fitment wood. The preservation method solves the technical problems that the steps of an existing treatment method are too complex, a large amount of time needs to be consumed, and operation is complex. The preservation method for the fitment wood comprises the following steps that a, the wood is subjected to drying treatment through a drying system; b, the wood is placed in a closed pressure impregnation tank, a preservative prepared from, by weight, 9-12 parts of an emulsifying agent, 4-6 parts of tribromophenol, 0.5-2 parts of chitin, 3-12 parts of kaolin, 3-8 parts of potassium bromide, 3-7 parts of nitroglycerin, 4-16 parts of sorbic acid, 3-5 parts of bronopol, 5-8 parts of acetic acid, 0.8-2.6 parts of kieselguhr, 2-5 parts of sodium chlorate, 1-2 parts of xylogen and 8-14 parts of quaternary ammonium salt is injected into the tank, the pressure is increased to range from 0.9 MPa to 1.2 MPa, after the pressure is kept for 4 h to 6 h, pressure relief is carried out, the preservative is discharged, and the wood is taken out of the tank; c, the wood obtained after the preservative is added is subjected to high-temperature nature determination treatment for 8 h to 12 h; and d, the wood obtained after high-temperature qualitative treatment is subjected to airing treatment, and then the fitment wood subjected to preservative treatment can be obtained. The preservation method has the beneficial effect of being easy and convenient to operate.