本文研究了我国东北四种常见木材在吸湿范围內含水率对渗透性影响的变化规律,得出了变化规律的数学模型,从木材与水分作用关系阐述了含水率对木材渗透性影响的机理。结果表明:①在吸湿范围内,木材渗透性与含水率成二次函数关系;②木材含水率在吸湿范围内,横向渗透性存在极值点;③木材纹孔膜上微孔的数目与半径随含水率的提高而减小。 In this paper, the variation regularity of moisture content on the permeability of four common woods in Northeast China was studied, and the mathematical model of the variation was obtained. The mechanism of water content on the permeability of wood was expounded from the relationship between wood and moisture . The results showed that: ① In the moisture absorption range, the permeability of wood is a quadratic function of moisture content; ② The moisture content of wood is within the range of moisture absorption with the extreme value of horizontal permeability; ③ The number and radius of micropores in wood- With the increase of water cut.