TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic impregnant is chosen from phenylcarbinol, ergol, ethyl benzoate, triacetin, polyethyleneglycol, propanediol, glycerin, citrate, hanoyl citrate, diester sebacate, glycol ether, triethyl phosphate, phthalic-acid ester, tartrate, propylene glycol mono-ether ether acetate, acrylic ester, pumping mineral oil, polyisobutene, glycol, octanol, ethyl lactate, butyrolactone, N-methyl ketopyrrolidine, dimethyl acetamide, Dimethyl sulfoxide (DMSO), tetrahydrofuran, caprolactam, N(b-glycolic ethide)lactamide, oleic acid, ethyl oleate, methyl decyl sulfoxide, pumping natural oil, acid or fatty acid glyceride, acid or fatty acid glycolase and/or sorbierite. The solid lipid comprises stearic acid, behenate, hexadecanoic acid, myristic acid, lauric acid, eicosanoic acid, caproic acid, 10-22C fatty acid or monofatty glyceride, difatty glyceride, trifatty glyceride, steroid, paraffin, cholesterin succinate, cholesterin butyric ester and/or cholesterin palmitate. Preferred Process: The biodegradable polymer is dissolved in single or mixed organic impregnant, solid lipid and medicine are dissolved in soluble organic impregnant, heated and mixed to obtain liquor. The obtained liquor is uniformly stirred to form homogeneous liquor.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The biodegradable polymer is chosen from ( alpha )-hydroxycarboxylate polymer, polylactic acid, lactic-acid glycolate multipolymer, polyphosphazenes, polyoxyethylene, polycaprolactone, polyglycolide, poly(lactide-caprolactone), poly(glycolide-caprolactone), poly(lactide-glycolide-caprolactone), poly(1,4-2-dioxane-ketone-lactide), chitosan, oligosaccharide, polyester, polymeric ortlio ester, Daiamid (RTM: polyamide elastomer), polyanhydride, branched polymer, disorder and block multipolymer. Preferred Composition: The monomer polymerization ratio of lactic-acid glycolate multipolymer is 95:5-5:95. Preferred Property: The molecular weight of lactic-acid glycolate multipolymer is 1000-200000.