A method for preparing an optically active 2-hydroxytetrahydrothienopyridine derivative, wherein said derivative is -methyl 2-(2-acetoxy-6,7-dihydrothieno[3,2-c]pyridin-5 -yl)-2-(2-chlorophenyl)-acetate or a pharmaceutically acceptable salt thereof, comprising the following reactions: wherein R7 is a C 1-6 alkyl, trifluoromethyl, pentafluoroethyl, heptafluoropropyl, phenyl, or a Z-substituted phenyl, in which Z is a C 1-3 alkyl, halo, cyano, nitro, or trifluoromethyl, and is at position 2, 3 or 4 of the phenyl ring; specifically comprising the following steps: reacting a compound of Formula II with a compound of Formula III or a salt thereof in the presence of a base, to obtain a compound of Formula IV or a salt thereof, where the solvent used is one or more selected from benzene, toluene, chloroform, n-hexane, cyclohexane, dichloromethane, 1,2-dichloroethane, methyl t-butyl ether, carbon tetrachloride, ethyl acetate, propyl acetate, butyl acetate, methanol, ethanol, acetone, tetrahydrofuran, diethyl ether, acetonitrile, N,N-dimethyl formamide, or dimethyl sulfoxide; the base used is selected from triethylamine, diisopropyl ethylamine, 1,8-diazabicyclo[5,4,0]undec-7-ene, potassium carbonate, sodium carbonate, potassium bicarbonate, or sodium bicarbonate; the reaction temperature is from -20°C to 100°C; and the salt of the compound of Formula III is selected from hydrochloride, p-toluenesulfonate, acetate, sulfate, phosphate, trifluoromethane sulfonate, oxalate, methanesulfonate, benzenesulfonate, or hydrobromide; and reacting the compound of Formula IV or the salt thereof with a compound of Formula V or a compound of Formula VI in the presence of a base, to obtain the compound of Formula I, where the reaction solvent used is one or more selected from benzene, toluene, chloroform, n-hexane, cyclohexane, dichloromethane, 1,2-dichloroethane, methyl t-butyl ether, carbon tetrachloride, ethyl acetate, propyl acetate, butyl acetate, methanol, ethanol, acetone, tetrahydrofuran, diethyl ether, acetonitrile, N,N-dimethyl formamide, or dimethyl sulfoxide; the base used is selected from triethylamine, sodium hydride, potassium hydride, 1,8-diazabicyclo[5,4,0]undec-7-ene, pyridine, diisopropylethylamine, lithium diisopropylamide, potassium carbonate, sodium carbonate, potassium bicarbonate, sodium bicarbonate, potassium t-butoxide, or sodium t-butoxide; and the reaction temperature is from -20°C to 100°C. reacting a compound of Formula II with a compound of Formula III or a salt thereof in the presence of a base, to obtain a compound of Formula IV or a salt thereof, where the solvent used is one or more selected from benzene, toluene, chloroform, n-hexane, cyclohexane, dichloromethane, 1,2-dichloroethane, methyl t-butyl ether, carbon tetrachloride, ethyl acetate, propyl acetate, butyl acetate, methanol, ethanol, acetone, tetrahydrofuran, diethyl ether, acetonitrile, N,N-dimethyl formamide, or dimethyl sulfoxide; the base used is selected from triethylamine, diisopropyl ethylamine, 1,8-diazabicyclo[5,4,0]undec-7-ene, potassium carbonate, sodium carbonate, potassium bicarbonate, or sodium bicarbonate; the reaction temperature is from -20°C to 100°C; and the salt of the compound of Formula III is selected from hydrochloride, p-toluenesulfonate, acetate, sulfate, phosphate, trifluoromethane sulfonate, oxalate, methanesulfonate, benzenesulfonate, or hydrobromide; and reacting the compound of Formula IV or the salt thereof with a compound of Formula V or a compound of Formula VI in the presence of a base, to obtain the compound of Formula I, where the reaction solvent used is one or more selected from benzene, toluene, chloroform, n-hexane, cyclohexane, dichloromethane, 1,2-dichloroethane, methyl t-butyl ether, carbon tetrachloride, ethyl acetate, propyl acetate, butyl acetate, methanol, ethanol, acetone, tetrahydrofuran, diethyl ether, acetonitrile, N,N-dimethyl formamide, or dimethyl sulfoxide; the base used is selected from triethylamine, sodium hydride, potassium hydride, 1,8-diazabicyclo[5,4,0]undec-7-ene, pyridine, diisopropylethylamine, lithium diisopropylamide, potassium carbonate, sodium carbonate, potassium bicarbonate, sodium bicarbonate, potassium t-butoxide, or sodium t-butoxide; and the reaction temperature is from -20°C to 100°C.