Preparation method of high-strength flame-retardant wood with fire early warning function

The invention discloses a preparation method of high-strength flame-retardant wood with a fire early warning function. The method comprises the following steps of partial delignification treatment of wood, treatment liquid vacuum impregnation treatment and densification enhancement of the impregnated wood. The boric acid and the graphene oxide are prepared into the functional mixed treatment liquid, the boric acid completely permeates into the wood by utilizing the difference of the penetration capacities of the boric acid and the graphene oxide to the wood, and the graphene oxide is mainly loaded on the surface of the wood, so that the use amount of the graphene is saved, and the cost is reduced; the flame retardant property of the wood is greatly improved through dipping treatment of boric acid and graphene oxide, and a graphene oxide/boric acid layer loaded on the surface of the wood plays a role in fire early warning; and the mechanical strength of the wood is also remarkably improved through combined tre