The invention provides an optically active 2-hydroxyltetrahydrothienopyridine derivative shown by formula I, or a pharmaceutically acceptable salt, solvate, polycrystal, enantiomer or racemization mixture thereof, wherein in the formula I, R1 is F, Cl, Br or I; m is 0 or 1; n is an integer from 1 to 6; R2 or R3 is independently hydrogen, C1-C6 alkyl or optionally substituted C1-6 alkyl; R4 or R5 is independently hydrogen, C1-C10 alkyl, C1-C10 alkenyl, C1-10 alkoxy, C1-10 aryl, halogen, acylamino, sulfmidyl, acyloxy or C(O)R', and R' is hydrogen, C1-C10 alkyl, C1-C10 alkenyl, C1-10 alkoxy, C1-10 aryl, halogen, acylamino, sulfmidyl or acyloxy. The compound has obvious platelet agglomeration resistance action, and the bioavailability of the compound is obviously higher than that of clopidogrel. The invention further provides a preparation method of the compound, a pharmaceutical composition containing the compound, and a pharmaceutical use of the compound and the pharmaceutical composition.