▎ 摘　　要

NOVELTY - Carrier composition comprises 0.1-5 pts. wt. magnesium compound, 20-70 pts. wt. alcohol compound and 100 pts. wt. carbon compound. USE - Carrier composition for catalyst. ADVANTAGE - The carrier composition has high activity and large specific surface area in the carrier, increases catalyst activity and porosity and improves strength. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing catalyst for polymerization of polyolefin, which involves reacting carrier, internal electron donor and transition metal compound prepared from carrier composition comprises magnesium compound, alcohol and carbon compound.