To investigate the mechanism of discoloration of black locus wood during thermal treatment process, the variations of functional groups in the lignin of black locust are studied by FTIR and UV-Vis.

• 摘要为探讨刺槐木材受热变色的原因，采用红外光谱和紫外光谱分析了刺槐磨木木素结构受热后官能团的变化。