Wood in the ultra high temperature treatment process, the concentration of hydroxyl groups of wood components decreased, reducing wood hygroscopicity and internal stress, and then reach the intention of wood scales smooth function increases; at the same time, wood components in super high temperature heat treatment process attack disorderly change, nutrient composition of hemicellulose degradation of wood fine structure, from the food chain in the chain is restrained fungi in wood growth, therefore, rot resistant function of carbonized wood got progress.