Solid catalyst component for olefin polymerization, and preparation method therefor and use thereof

A solid catalyst component for olefin polymerization, wherein the solid catalyst component comprises magnesium, titanium, a halogen, a poly(α-olefin), and an internal electron donor, wherein a Ti2p spectrum obtained from XPS analysis of the solid catalyst component is subjected to peak separation by means of Gaussian-Lorentzian peak-separation fitting, and the result of the peak separation shows that the spectrum peaks of the Ti2p3/2 orbit have at least three characteristic peaks at positions where an electron binding energy is 459.9-454.9 eV;

• wherein the method of Gaussian-Lorentzian peak-separation fitting includes setting that a Lorentz-Gaussian ratio is 30%, the difference between an electron binding energy of the spectrum peak of the Ti2p1/2 orbit and an electron binding energy of the spectrum peak of the Ti2p3/2 orbit is 5.9 eV, the half-peak width of the spectrum peak of the Ti2p1/2 orbit is 1.7 times the half-peak width of the spectrum peak of the Ti2p3/2 orbit, the peak height of the spectrum peak of the Ti2p1/2 orbit is 0.28 times the peak height of the spectrum peaks of the Ti2p3/2 orbit, and each characteristic peak of the spectrum peaks of the Ti2p3/2 orbit has the same half-peak width.