The wood dryer generates a uniform microwave field to heat the wood itself as a whole, which can eliminate the temperature gradient and moisture gradient in the drying process. The temperature of the whole wood is basically the same. The water is discharged from the inside to the outside at the same time so that the expansion and contraction coefficients of wood are basically the same. In this way, the loss of deformation, cracking, drying and carbonization can be avoided to the maximum extent during the drying process of wood, and the yield of wood can be greatly improved. The equipment adopts tunnel integrated design, adjustable power distribution design according to process design, gradient power density design, meeting process requirements, simple and reliable operation, automatic feeding and discharging design, and microwave wood insecticidal experiment shows that the drying speed of 25-50mm pine wood is 20-30 times faster than the usual convection drying speed. The temperature of microwave sterilization and insecticidal treatment is only 65-85 degrees, and the sterilization time is 5-10 minutes. The whole process is not deformed and cracked, so the wood treated by microwave has an even insecticidal effect.