Hot leveling technology and its theory foundation were introduced as the new approach to replace the traditional sanding process. The application of hot teveling and roller pressing could make the heated fine hair shape wood fiber molded and fixed on the timber surface and thus the wood surface would become dense, bright and clean. Wood surface could be leveled with the heat generated from sawing by setting up the hot leveling tool behind the cutting tool. This paper also pointed out that both high frequency mechanical vibration and ultrasonic leveling had good effects for various materials, and could be applied in many occasions because of the flexible frequency and power adjustment range.