应用扫描电子显微镜对白山地区新厂期上斜正笔石式树形笔石的体壁进行了能谱分析，测出了笔石体壁中的Ｍｇ、Ｃａ、Ａｌ、Ｆｅ、Ｓｉ、Ｓ、Ｋ７种元素的含量，其中Ｍｇ、Ａｌ、Ｆｅ、Ｓｉ、Ｓ、Ｋ６种元素含量稳定，含量从高到低依次为Ｆｅ，Ｓｉ、Ａｌ、Ｓ、Ｍｇ、Ｋ。这６种元素可能是构成笔石体壁原始化学成分中的重要元素。 The scanning electron microscope (SEM) was used to analyze the energy spectrum of the body wall of the orthodontic pen-stone tree in the new plant of Baishan District, and the contents of Mg, Ca, Al, Fe, Si, S, K7 elements content, of which Mg, Al, Fe, Si, S, K six kinds of elements content is stable, from high to low in order of Fe, Si, Al, S, Mg, These six kinds of elements may constitute the pen petrified wall of the original chemical composition of the important elements.