The invention relates to a catalyst used for synthesizing polyketone by copolymerization of carbon monoxide and cinnamene and a method for synthesizing the same. The catalyst comprises palladium acetate, para-benzoquinone, paratoluenesulfonic acid, fluoboric acid or a mixture of the palladium acetate, the para-benzoquinone, the paratoluenesulfonic acid and the fluoboric acid and 4, 4'-dicarboxylic acid carbethoxyl group-2,2'- dipyridyl. In the invention, carbon monoxide and cinnamene are taken as materials, and absolute methanol is taken as a solvent, and under the conditions of a temperatureof between 20 and 80 DEG C and a pressure of between 0.1 and 10Mpa and in the presence of the catalyst, the materials undergo the polymerization reaction for 1 to 3 hours. The catalyst provided by the invention has the advantages of good activity, high yield of the polyketone and high relative molecular mass of the synthesized polyketone; under the condition of the same use level of the main catalyst palladium acetate, the addition of the 4, 4'-dicarboxylic acid carbethoxyl group-2, 2'- dipyridyl can not only improve the activity of the catalyst by 1 to 3 times, but also improve the relative molecular mass of the polyketone by 1 to 2 times.