NOVELTY - Preparing taxane medicine 7,10-dimethoxydocetaxel, comprises e.g. reacting 7,10-di-O-trichloroethoxycarbonyl-10-deacetyl-baccatin III with a silane protective agent to obtain 13-silyl-protected 7,10-dihydroxy-10-deacetyl-baccatin III (III), reacting (III) with dimethyl sulfoxide, acetic acid and acetic anhydride to obtain 13-silyl-protected 7,10-dimethoxy-10-deacetyl-baccatin III (V), reacting (V) with fluorine-containing reagent and (4S,5R)-2-(4-methoxyphenyl)-4-phenyl-3,5-oxazolidin-dicarboxylic acid 3-tert-butyl ester respectively, and performing protecting reaction of obtained compound.    USE - The method is useful for preparing taxane medicine 7,10-dimethoxydocetaxel.    ADVANTAGE - The method: has simple and convenient process, and mild reaction condition; utilizes simple device, which is easy to operate; does not use highly-toxic methylating reagents e.g. iodomethane or dimethyl sulfate; and is suitable for industrial production.    DETAILED DESCRIPTION - Preparing taxane medicine 7,10-dimethoxydocetaxel, comprises (i) reacting 7,10-di-O-trichloroethoxycarbonyl-10-deacetyl-baccatin III (II) in N,N-dimethylformamide under action of a silane protective agent and a base, then extracting to obtain crude product, reacting the crude product in a reaction solvent under action of zinc powder and acetic acid to obtain 13-silyl-protected 7,10-dihydroxy-10-deacetyl-baccatin III (III), (ii) reacting (III) under action of dimethyl sulfoxide, acetic acid and acetic anhydride to obtain 13-silyl-protected 7,10-di-O-methylthiomethyl-10-deacetyl-baccatin III (IV), (iii) reacting (IV) in a reaction solvent under action of an alloy and hydrogen to obtain 13-silyl-protected 7,10-dimethoxy-10-deacetyl-baccatin III (V), then (iv) reacting (V) in a reaction solvent under action of fluorine-containing reagent to obtain 7,10-dimethoxy-10-deacetyl baccatin III (VI), (v) reacting (VI) with (4S,5R)-2-(4-methoxyphenyl)-4-phenyl-3,5-oxazolidin-dicarboxylic acid 3-tert-butyl ester in a reaction solvent under action of N,N-dicyclohexylcarbodiimide and 4-dimethylaminopyridine to obtain 13-O-((4S,5R)-2-(4-methoxyphenyl)-4-phenyl-N-(tert-butoxycarbonyl)-oxazolidin-5-carbonyl)-7,10-dimethoxy-10-deacetyl baccatin III (VII), and (vi) taking (VII), carrying out protecting reaction after deacetalization under action of an acid to obtain 7,10-dimethoxydocetaxel crude product, and then purifying the 7,10-dimethoxydocetaxel crude product by column chromatography, and crystallizing.