OBJECTIVE :To study the preparation technique and clinical therapeutic effect of Tangan capsules METHODS : Tangan capsule was made of chrominum pyridinate ,crystalline cellulose ,starch and vehicle The content of chrominum pyridi natein product was detected with HPLC RESULTS :This preparation was rationalin design ,feasible in preparation technique , stable in quality,reliable in quality control and satisfactory in the rapeutic efficacy CONCLUSION :Tangan capsuleis of im portance as an accessory agent in treating type 2 diabetes.