Wood fire retardant, preparation method and applications thereof

The invention relates to a wood fire retardant which comprises the following raw materials by weight part: phosphoric acid, urea, catalyst, water and silica sol. The invention also relates to a method for preparing the wood fire retardant and applications of the wood fire retardant which serves as a wood size stabilizer. The fire retardant provided by the invention is obvious in flame-retardant effect and has a good size stabilization function. In addition, the wood fire retardant has a formaldehyde elimination function and can effectively improve the environment-friendly characteristics of an artificial board during artificial board treatment. The wood fire retardant is simple in preparation method and low in cost and is far lower than the price of the conventional domestic and overseas wood fire retardants.