Dry-prepolymerized olefine polymer catalyst and preparation method thereof, and gas-phase olefines polymerization method

IVB of (A) particle carrier, (B) supported on the particle carrier (A) on: The present invention relates to a prepolymerized olefin polymerization catalyst, the catalyst comprising a solid catalyst component and an olefin prepolymer, the solid catalyst component comprising transition metal compound and (C) is supported on the particle carrier organoaluminum oxy-compound on (a), characterized in that the volatile matter content of the dry prepolymerized catalyst is not more than (by weight) 2.0%; and a method for preparing the catalyst and gas phase olefin polymerization process using the catalyst. Dry prepolymerized catalyst of the present invention have good flowability and a high polymerization activity, it can be stably added to the reactor.