The invention relates to a complexed wood material and an in-situ complexing method thereof and belongs to the technical field of wood processing. The in-situ complexing method of the complexed wood material comprises the following steps: by taking wood cells as a micro reactor, performing in-situ complexing on plant polyphenol and metal salts in wood cell walls, cell cavities and cell spaces, soas to obtain the complexed wood material. As the plant polyphenol and the metal salts are introduced into the wood cell walls, the cell cavities and the cell spaces of the wood material provided by the invention, the plant polyphenol and the metal salts are immobilized in cells of the wood material through a complexing reaction of the plant polyphenol and the metal salts, and thus the wood material has the advantages that cracking is reduced or cracking is avoided, the size stability is improved, the texture layering is improved, rich colors are achieved, corrosion is prevented, mold is prevented, and the like.