Having analyzed the types of wood decay and insect of the wood, the wood structure has been treated by varied preservatives and treatment methods. The main species of wood components of the building are Hard Pine ( Pinus spp. Subgen. Diploxylon ), Soft Pine ( Pinus spp. Subgen. Haploxylon ), Larch ( Larix spp.) and Spruce ( Picea spp.). The test result showed that the mechanical strength of treated wood was not affected significantly by the methods of treatment. The forced air drying method for treated timber is simple, easy and efficient.