The production process of LVL laminated veneer lumber is basically the same as that of plywood. It is formed by Lamination of veneers along the grain direction, and it is a product that is manufactured with the aim of replacing sawn timber, the LVL laminated veneer lumber has the following four characteristics: 1. The structure is uniform, the dimensional stability is good, the lamination structure of the laminated veneer lumber greatly reduces the possibility of the plate to appear the defects such as the warp and the torsion, has the good stability, the distortion is small. 2. Production and application can be standardized and serialized. In the process of production, the veneer is graded according to certain standards to produce products with different quality standards. 3. High Strength. Laminated veneer lumber is a building material with a high strength-to-weight ratio, superior to steel. The change rate of the mechanical properties of Sawn timber is more than 30% , and the change rate of LVL strength is less than 12% . Therefore, LVL has uniform structural characteristics and high reliability. 4, high economy, no special requirements for raw materials, can use fast-growing wood, small diameter and short wood as raw materials. The economy of laminated veneer lumber is concentrated on the value-added effect of using the inferior wood for the superior one and the inferior wood for the superior one. It can use different species and different quality wood for lamination bonding without removing knots and other defects, compared with Glulam, the yield of Glulam can be increased by more than one time.