[目的]研究棉秆的结构及热解规律。[方法]采用热重分析法研究了棉秆纵向(棉杆和棉根)及横向(皮层、质层和髓层)的热解特性。[结果]棉秆是一种质地不均匀的材料,其横、纵向各结构存在较大差异,各层成分含量差异明显。棉杆和棉根随升温速率增大反应程度越剧烈,炭得率依次减小,且相同升温速率下,棉杆炭得率高于棉根;皮、芯、髓层炭得率依次减小,皮层反应剧烈程度小于芯和髓层。[结论]为获得棉秆活性碳技术提供了理论依据。 [Objective] The research aimed to study the structure and pyrolysis law of cotton stalk. [Method] The pyrolysis characteristics of cotton stalk (cotton stalk and cotton stalk) and transverse (cortex, stratum and medulla) were studied by thermogravimetric analysis. [Result] Cotton stalk was a kind of material with uneven texture. There was a big difference in the structure between the two sides. The reaction rate of cotton stalks and cotton roots increased with the increase of heating rate, the carbon yield decreased in turn, and under the same heating rate, the carbon yield of cotton stalk was higher than that of cotton stalks; , Cortical reaction less intense than the core and medulla. [Conclusion] This provided the theoretical basis for obtaining the activated carbon technology of cotton stalk.