▎ 摘　　要

NOVELTY - Preparation of dual-crystal phase cobalt-based Fischer-Tropsch synthesis catalyst involves (s1) uniformly mixing a nitrogen-containing ligand and a carbon carrier, (s2) roasting to obtain aza-carbon carrier, (s3) synthesizing cobalt-based catalyst precursor by impregnation method, (s4) preparing cobalt-based catalyst by roasting the precursor, and (s5) pre-treating in an atmosphere containing hydrogen at 0.1-5 MPa, preferably 1-3 MPa at 200-500℃, preferably 220-350℃ for 1-10 hours, preferably 2-6 hours. USE - Preparation of dual-crystal phase cobalt-based catalyst used for catalyzing Fischer-Tropsch synthesis reaction (all claimed). ADVANTAGE - The method is simple, and provides cobalt-based catalyst having improved catalytic activity of Fischer-Tropsch synthesis reaction and selectivity of C5+ hydrocarbon. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for use of the catalyst for catalyzing Fischer-Tropsch synthesis reaction.