本文在对笔石作系统研究的基础上,对樟木曲组的笔石带进行了补充和修正。由原来的9个笔石带划分为11个笔石带,厘定了各笔石带的范围和笔石群的总体面貌,并逐带与国内外进行了对比。文内还涉及到宁国阶的顶界、上下两层下垂时笔石以及关于肿笔石与心笔石混生的问题。 Based on the systematic study of pen-stone, this paper supplements and corrects the pen-stone belt of Zhangmu song group. Divided into nine pen-stone belts by the original nine pen-stone belts, the scope of each belts and the overall appearance of the pen-stone group were determined and compared with those at home and abroad. The article also relates to the top of the Ningguo order, pen and stone when the upper and lower sag, as well as the mixed penis and heart pen and stone problems.