Radial variation in the tracheid length of both Pinus massoniana Lamb, and Cunninghamia lanceolata Hook, sampled from Nanping, Fujian, shows that it increases rapidly outwards from the pith within the first 10 years, [then declinesuntil the maximum length occurs between the 10th to 15th ring. Then it tends to renain stable or shows a little flactuation. No consistent difference between the southern radius and northern radius of the diametral strip was found in the tracheid length.Vertical tracheid length variation from the pith to the rings at various heights of both species in Guiyang, Guizhou, shows that it increases slightly upwords to the height of 9.3m, at which an apparent decrease occurs.The length of tracheids in masson pine taken from nine localilie in six province, including three natural stands and six plantations is determined, which is from 3.00 to 3.58mm.