Abstract: 【Objective】Fiber morphologies are characterized among moso bamboos from 15 regions for providing reference of the raw material selection for papermaking.【Method】Fiber samples are produced by Jeffery solution. And fiber morphology, length, width and wall thickness et cetera, are characterized by microscope observation. The collected data are used for calculation of length-width ratio and runkel ratio as well as statics analysis. 【Result】Morphologies of most moso bamboo fibers in each region are like a spindle. However, up to 5.33% fibers are found to have abnormal morphologies. The average length and length-width ratio of moso bamboo fibers in each region is more than 2 mm and 35, respectively. Among the 15 investigated regions, moso bamboo fiber of Wuyishan with length of 2.93 mm, which is the longest, has the largest length-width ratio, 134.78. And Renhua moso bamboo possesses the highest proportion of fibers with length more than 2 mm, which reaches to 97%. In addition, moso bamboo fibers from Taojiang and Renhua with average cell wall thickness of 8.96 μm and 15.56 μm, are the thinnest and the thickest, respectively. The smallest average runkel ratio is found in Longyou moso bamboo fiber with value of 1.18. And with value of 2.98, Yixing moso bamboo has the fibers with the biggest runkel ratio. 【Conclusion】Moso fibers in each investigated regions all are suitable for paper-making. However, regard of the proportion of long fibers, the length-width ratio and the ratio of abnormal moso bamboo fiber cells, Wuyishan moso bamboo is more advantageous than those from other places for paper-making. According to cell wall thickness and runkel ratio, moso bamboo fibers from Taojiang are the most suitable for producing tight paper, while fibers of Renhua and Yixing are the best for making papers with loose texture and well water absorption.