Since the cross-linking of borates strengthens the structural connection between cells, mechanically superior structural material based on lignocellulose/borate is synthesized using a s mechanical pretreatment method and a binder free hot-pressing method. The results show that the pine lignocellulose formed a dense laminated structure after compressive force, shears, and friction forces and hot–pressing. And microfibrillated cellulose material retained the chemical composition of untreated lignocellulose and the mechanical milling processes of active hydroxyl groups formed by the condensation reaction of borate orthoester with furfural resin adhesive. The flexural strength, modulus elasticity and internal bonding strength of microfibrillated cellulose material are 5, 2.5 and 4.1higher than the untreated lignocellulose specimen, respectively. Furthermore, the thickness swelling rate was 5.66%, which are 298% lower than untreated lignocellulose specimen, indicating its excellent dimensional stability. This is mainly due to the layering and branching of pine lignocellulose during mechanical milling, which gives it more ester and hydrogen bonds, expanding the ratio to surface area and exposing more hydroxyl groups. And the formation of furfuryl alcohol occurred in the hot-pressing process, including the degradation of monosaccharides to furfural, the condensation reaction between lignin and furfural, the resinization of furfural, and the formation of hydrogen bonds. The resulting stable laminated covalent cross–linking structure and the cross–linking of nano–lignocellulose/borate ensure that the material has an excellent mechanical performance, which provides some unique strategies and theoretical guidance to design a superior mechanical–performance structural material from lignocellulose.