Acrylic acid catalyst and preparation method

The present invention relates to selective oxidation of propylene to acrylic acid catalyst, the main problem to solve complex system catalyst the oxidation of propylene to acrylic acid present in the prior art using two catalysts brought, by using a catalyst comprising in weight percent 40-60% catalyst 2,3-8% binder before 1,30-50% SiO2 catalyst precursor body; catalyst precursor into an active form Mo12 Bia Feb Nic Sbd Xe Yf Zg Qq Oχ, 2 parts of active catalyst precursor of Mo12 VaCubXcYdZe Oχ; before 1 wherein the catalyst is a catalyst precursor and the catalyst precursor and the second aspect binder are mixed and molded body obtained manner, a better solution to the technical problem, can be used for industrial production of acrylic acid.