The invention relates to a weight- and blood fat- reducing infusion prepared of pure Chinese medicinal herbs and the preparing process thereof, prepared of fifteen Chinese medicinal herbs such as Virgate Wormwood Herb, Oriental Waterplantain Rhizome, Cassia obtusifolia L, etc, by the following steps of: washing, drying, mixing and crushing->decocting->placing->concentrating->preparing soft material->making granules->drying->regulating granules->split-charging->checking->obtaining the finished products, and it relates pathogenesis of adiposity, high blood fat, diabetes and hihg blood pressure, improving micro circulation, increasing blood flow, improving blood viscosity, preventing cardio and cerebral embolism, anti-oxidizing, eliminating in vivo free radicals, reducing blood fat, clearing pulse, reducing blood pressure and sugar, reducing weight, thus having obvious clinical curative effect on patients with adiposity, high blood fat, diabetes and hihg blood pressure, and able to prevent diseases and senescence and prolong life.