In order to purify blogical chinese herbal medicine from wood etractives and hmicellulose at the molecular level, the fresh Chinese-fir cells were extracted in LiOH soltion, and were analyzed by ZETA and SIZER to find out the leaching rule of nano particles in Chinese-fir cells. The results are as follows: (1) The extraction mass arrived at the maximum value when LiOH concentration is about 17.5%. (2) The diameter the micro/nano particles of wood extractives and hemicellulose is chiefly about 1720 nm according to volume fraction. Micro/nano par...