A method for producing a solid olefin polymerization catalyst component, an olefin polymerization catalyst and an olefin-based polymer

The present invention provides an olefin polymerization solid catalyst component has high activity and polymerization activity of hydrogen, a smaller amount of hydrogen can be good yield and a high MFR is obtained and a high stereoregularity polymer, and copolymerization activity high block copolymerization ratio and other good properties, and a small load on the environment. The olefin polymerization solid catalyst component is characterized in that, in an inert organic solvent (a) a magnesium compound, (b) the formula R12C (COOCH3) 2 (Formula, R1 is selected from a carbon atom number of 3 to 20 branched alkyl group, a halogen atom, carbon atoms, a linear or branched halogen substituted alkyl group having 2 to 20 carbon atoms, a linear alkyl group having 1 to 20 carbon atoms, cycloalkyl having 3 to 20 group, vinyl group, and any one of an allyl) represented by the internal electron donor, and (c) a tetravalent halogen compound into contact with each.