An oxazolidone compound represented by the following general formula, an enantiomer, diastereoisomer and racemates thereof as well as their mixtures, and a pharmaceutically acceptable salt thereof; wherein, R 1 is -CH 2 NHCOR 2, -CH 2 CH 2 NHCOR 2, -CH 2 NHCONHR 2 or -CH 2 NHCOCONHR 2; R 2 is substituted or unsubstituted phenyl, substituted or unsubstituted 5- or 6- membered heterocyclic group; in the circumstance of substituted phenyl, the substituent of phenyl is a radical selected from the group consisting of: halogen, -NO 2, -CHO, -CF 3, -CONR 4 R 5, -COR 4, -NHR 5, -NHCOR 4, -OR 5, -SO 2 R 4, -SO 2 NHR 5 or C 1 -C 3 alkyl; said R 4 is C 1 -C 3 alkyl, R 5 is H or C 1 -C 3 alkyl; said 5- or 6- membered heterocyclic group contains at least one heteroatom selected from N, O or S; in the circumstance of substituted 5- or 6- membered heterocyclic group, the substituent of 5- or 6- membered heterocyclic group is a radical selected from the group consisting of: halogen, -NO 2, -CHO, -CF 3, -CONR 4 R 5, -COR 4, -NHR 5, -NHCOR 4, -OR 5, -SO 2 R 4, -SO 2 NHR 5, C 1 -C 3 alkyl; said R 4 is C 1 -C 3 alkyl, R 5 is H or C 1 -C 3 alkyl; R 3 is substituted or unsubstituted C 1 ∼C 3 amido, substituted or unsubstituted phenyl or substituted or unsubstituted 5- or 6- membered aromatic or non-aromatic heterocyclic group; in the circumstance of substituted C 1 ∼C 3 amido, the H on N of said C 1 ∼C 3 amido is substituted with C 1 ∼C 3 alkyl; in the circumstance of substituted phenyl, the substituent of phenyl is a radical selected from the group consisting of: F, Cl, Br, CN, -NO 2, -CF 3, -CONR 4 R 5, -COR 4, -NHR 5, -NHCOR 4, -OR 5, -SO 2 R 4, -SO 2 NHR 5 or C 1 -C 3 alkyl; said R 4 is C 1 -C 3 alkyl, R 5 is H or C 1 -C 3 alkyl; said 5- or 6- membered aromatic heterocyclic group contains at least one heteroatom selected from N, O or S, and in the circumstance of substituted 5- or 6- membered aromatic heterocyclic group, the substituent of 5- or 6- membered aromatic heterocyclic group is a radical selected from the group consisting of: F, Cl, Br, CN, -NO 2, -CF 3, -CONR 4 R 5, -COR 4, -NHR 5, -NHCOR 4, -OR 5, -SO 2 R 4, -SO 2 NHR 5 or C 1 -C 3 alkyl; said R 4 is C 1 -C 3 alkyl, R 5 is H or C 1 -C 3 alkyl; said 5- or 6- membered non-aromatic heterocyclic group contains at least one heteroatom selected from N, O or S, and said heterocyclic group can further form a spiroring with another 3 to 6- membered heterocyclic group; and in the circumstance of substituted 5- or 6- membered non-aromatic heterocyclic group, the substituent of 5- or 6- membered non-aromatic heterocyclic group is a radical selected from the group consisting of: oxo, F, Cl, Br, CN, -NO 2, -CF 3, -CONR 4 R 5, -COR 4, -COPh, -NHR 5, =NH, -NHCOR 4, -SO 2 NHR 5; said R 4 is C 1 -C 3 alkyl, R 5 is H or C 1 -C 3 alkyl. R 1 is -CH 2 NHCOR 2, -CH 2 CH 2 NHCOR 2, -CH 2 NHCONHR 2 or -CH 2 NHCOCONHR 2; R 2 is substituted or unsubstituted phenyl, substituted or unsubstituted 5- or 6- membered heterocyclic group; in the circumstance of substituted phenyl, the substituent of phenyl is a radical selected from the group consisting of: halogen, -NO 2, -CHO, -CF 3, -CONR 4 R 5, -COR 4, -NHR 5, -NHCOR 4, -OR 5, -SO 2 R 4, -SO 2 NHR 5 or C 1 -C 3 alkyl; said R 4 is C 1 -C 3 alkyl, R 5 is H or C 1 -C 3 alkyl; said 5- or 6- membered heterocyclic group contains at least one heteroatom selected from N, O or S; in the circumstance of substituted 5- or 6- membered heterocyclic group, the substituent of 5- or 6- membered heterocyclic group is a radical selected from the group consisting of: halogen, -NO 2, -CHO, -CF 3, -CONR 4 R 5, -COR 4, -NHR 5, -NHCOR 4, -OR 5, -SO 2 R 4, -SO 2 NHR 5, C 1 -C 3 alkyl; said R 4 is C 1 -C 3 alkyl, R 5 is H or C 1 -C 3 alkyl; R 3 is substituted or unsubstituted C 1 ∼C 3 amido, substituted or unsubstituted phenyl or substituted or unsubstituted 5- or 6- membered aromatic or non-aromatic heterocyclic group; in the circumstance of substituted C 1 ∼C 3 amido, the H on N of said C 1 ∼C 3 amido is substituted with C 1 ∼C 3 alkyl; in the circumstance of substituted phenyl, the substituent of phenyl is a radical selected from the group consisting of: F, Cl, Br, CN, -NO 2, -CF 3, -CONR 4 R 5, -COR 4, -NHR 5, -NHCOR 4, -OR 5, -SO 2 R 4, -SO 2 NHR 5 or C 1 -C 3 alkyl; said R 4 is C 1 -C 3 alkyl, R 5 is H or C 1 -C 3 alkyl; said 5- or 6- membered aromatic heterocyclic group contains at least one heteroatom selected from N, O or S, and in the circumstance of substituted 5- or 6- membered aromatic heterocyclic group, the substituent of 5- or 6- membered aromatic heterocyclic group is a radical selected from the group consisting of: F, Cl, Br, CN, -NO 2, -CF 3, -CONR 4 R 5, -COR 4, -NHR 5, -NHCOR 4, -OR 5, -SO 2 R 4, -SO 2 NHR 5 or C 1 -C 3 alkyl; said R 4 is C 1 -C 3 alkyl, R 5 is H or C 1 -C 3 alkyl; said 5- or 6- membered non-aromatic heterocyclic group contains at least one heteroatom selected from N, O or S, and said heterocyclic group can further form a spiroring with another 3 to 6- membered heterocyclic group; and in the circumstance of substituted 5- or 6- membered non-aromatic heterocyclic group, the substituent of 5- or 6- membered non-aromatic heterocyclic group is a radical selected from the group consisting of: oxo, F, Cl, Br, CN, -NO 2, -CF 3, -CONR 4 R 5, -COR 4, -COPh, -NHR 5, =NH, -NHCOR 4, -SO 2 NHR 5; said R 4 is C 1 -C 3 alkyl, R 5 is H or C 1 -C 3 alkyl.