The result of research showed that: the drying rate of small-diameter lumber had fallen obviously after the MC getting 15%, and the rate of anaphase drying times 2~3 was prophase drying.
The stress of surface layer of small_diameter Asian White Birch(Betula platyphylla)timber with consecution_heat and intermittent_heating(intermittent 2 h and intermittent 6 h)was discussed.