Wood treatment agent and preparation method thereof

The invention relates to a wood treatment agent and a preparation method thereof. The wood treatment agent comprises the following raw materials by weight parts: 80-150 parts of phosphoric acid, 50-120 parts of urea, 0.4-0.8 part of catalyst and 1-6 parts of cross-linking agent. The phosphoric acid and urea are polymerized due to the action of the catalyst to obtain the wood treatment agent. The experiment proves that the wood treatment agent applied to woods has a good flame-retardant effect, high dimensional stability and good formaldehyde elimination, is simple in preparation method and low in cost and can be widely applied to wood treatment of interior decoration, furniture manufacturing and the like.