This study is to report the evaluation of the micromeritic properties of LubriTose AN, which is expected to provide preliminary theoretical basis for the direct compression technology.  From the aspects  of flowability, compressibility and dilution potential, the angle of repose, flow velocity, the Carr’ index, tensile strength, elastic recovery, yield pressure and the lubricating ability of LubriTose AN were determined.  Also, model drugs were selected to investigate the dilute potential under the desirable compressing performance.  Compared to the physical mixtures, the flowability of LubriTose AN was better, and the deformation mechanism was the same with anhydrous lactose, both brittle deformation.  The compressibility and compaction of LubriTose AN was slightly better than that of physical mixtures under low and moderate pressure.  The dilution potential of LubriTose AN were high for most of hydrophobic drugs.  The lubricate ability was desirable under different rotational speeds.  LubriTose AN is an excellent co-processed excipient, which is helpful for the promotion and improvement of the tablet manufacturing level.