Catalyst for acrylic acid synthesis and preparation method of catalyst

The invention relates to a catalyst for acrylic acid synthesis as well as a preparation method of the catalyst and a synthetic method of the acrylic acid. The catalyst is mainly used for solving the problems of relatively low activity and selectivity of the catalyst in the prior art. The problems are solved very well by adopting a technical scheme that the catalyst for synthesizing acrylic acid by acraldehyde oxidization comprises the following components in parts by weight: 5-60 parts of hydrotalcite-like carriers, 40-95 parts of active components Mo12VaCubWcXdYeZfOg carried on the hydrotalcite-like carriers, wherein X represents at least one element of Cr, Mn and Sb, Y is at least one element selected from Fe, Bi, Co, Ni, Ge, Ga, Nb, Ce, La, Zr and Sr, and Z is at least one element selected from alkali metals or alkaline-earth metals. The catalyst can be used for industrial production of the acrylic acid.