Polyquinolines containing diphenylphosphine ligands attached to an incorporated phenanthrene ring were prepared by the polymerization of the appropriate molar ratios of 4,4'-diamino-3,3/-dibenzoyldiphenyl ether, 4,4'-diacetyldiphenyl ether, and 3,6-diacetyl-9-(diphenylphosphino)phenanthrene or by the phosphination of the polyquinoline containing 9,10-dichlorophenanthrene units in the backbone with alkali diphenylphosphide. Hydroformylation reactions were carried out in the presence of these polyquinoline-supported catalysts.