Described herein is a prepolymerized catalyst encapsulated with macromolecular
monomers which is prepared by adding olefin mononers and diene compounds to a solid
complex titanium catalyst for olefin polymerization and then polymerizing, and
also relates to a method for polymerization or copolymerization capable of preparing
polyolefins with high melt strength by polymerizing the olefin by using said catalyst.
