Abstract: DRA with single-peak and double-peak poly α-olefine for oil products are prepared through bulk polymerization by using bimetallic complex TiCl₃ catalyzer, N type Ziegler-Natta catalyzer and O, O, N, N metallocene as major catalyzers to determine the impacts of catalyzer types and volumes on molecular mass, distribution of molecular mass of poly α-olefine products and performances of DRA. Research results show that O, O, N, N metallocene catalyzer has the highest efficiency in all of the three catalyzers. In addition, produced poly α-olefine products have the most favorable molecular mass, molecular mass distribution and drag reducing performances. Efficiency and drag reducing performances of double-peak poly α-olefine DRA produced by using bimetallic complex TiCl₃ and O, O, N, N and N type Z-N and O, O, N, N are all superior than that of single-peak poly α-olefine DRA.