Catalyst of methacrylaldehyde and methacrylic acid, as well as preparation method of catalyst for synthesizing methacrylaldehyde and methacrylic acid

The invention relates to a catalyst for synthesizing methacrylaldehyde and methacrylic acid, as well as a preparation method of the catalyst for synthesizing the methacrylaldehyde and the methacrylic acid, and a synthesis method of the methacrylaldehyde and the methacrylic acid, and mainly solves the problem that the catalyst used for selective oxidation reaction of isobutylene is poor in stability in the prior art. The active components of the catalyst of the methacrylaldehyde and the methacrylic acid have the following general formula: Mo12BiaFebCocXdYeZfOx, wherein X is selected from at least one of W, V, Ni, Cr, Mn, Nb, Re and La; Y is selected from at least one of Sn, Sr, Zn, Ti or Zr; Z is selected from at least one of Na, Li, Tl, K, Cs, Mg or Ca, so that the problem is relatively well solved, and the catalyst can be used for industrial production of the methacrylaldehyde and the methacrylic acid.