Bezafibrate(BZ) was micronized by gas antisolvent(GAS) process with supercritical CO_2(SCCO_2) as an antisolvent, and the needle-like crystallines with ordered structure were obtained. The results showed that smaller microparticles were obtained at higher crystallizing temperature and lower pressure, and meanwhile the length of crystalline decreased as the concentration of BZ decreased. The length of crystalline altered with the kind of solvents, and it did not show significant change with the flow rate of ...