An internal
electron donor compound, a catalyst component and an
olefin polymerization method. The internal
electron donor compound has
structural formula (I) as shown below. In the formula, R0 is C or D, wherein C is selected from H,
halogen, a cyano group, saturated or unsaturated C1-C10 linear or branched
alkyl, cycloalkyl, alkenyl, an ester group, phenyl, alkylphenyl, phenylalkyl, indenyl, benzyl, and halogenated or
heteroatom-substituted
alkyl, cycloalkyl, phenyl, alkylphenyl, phenylalkyl, indenyl and benzyl, the
heteroatom being selected from N, O, S, P and Si, or C is selected from a heteroaryl
substituent, and D has 4-30 carbon atoms, and is substituted or unsubstituted
alkyl containing at least two rings,
heteroatom-substituted heteroaryl containing at least two rings or an amino group containing at least two rings; R1-R3 are the same or different, and are each independently selected from H,
halogen, C2-C18 alkenyl, C1-C18 substituted or unsubstituted linear or branched alkyl, cycloalkyl, phenyl, alkylphenyl, phenylalkyl, indenyl and benzyl, and two or more of R1-R3 can be bonded to each other to form a ring or an unsaturated bond; A and B are the same or different, and are each independently selected from an ester group, an amino group, an
amide group, a
sulfonyl ester group and a sulfonamide group; a
substituent used for substitution is alkenyl,
halogen or a heteroatom, and the heteroatom is selected from N, O, S, P and Si; and when R0 is C, R1 and R2 are bonded to each other to form a ring, A is an ester group connected to the parent
benzene ring by means of a hydroxyl group, and B is an ester group connected to the parent
benzene ring by means of a carboxyl group. The catalyst prepared from the internal
electron donor exhibits very high catalytic activity and
hydrogen sensitivity in
olefin polymerization.