Acrylaldehyde catalyst prepared by propylene oxidation method and its preparation method

The invention relates to an acrylaldehyde catalyst by a propylene oxidation method and its preparation method, which solves the problems of low catalyst reaction yield and selectivity in the prior art. The method employs at least one of SiO2 or Al2O3 as a carrier, and the catalyst containing active components is expressed in the following general formula: Mo12BiaFebXcYdZeQfOx, wherein X is at least one selected from of Ni, Mg, Co. Ca, Be, Cu, Zn Pb or Mn; Y is at least one selected from Zr, Th or Ti; Z is at least one selected from K, Rb, Na, Li, Tl or Cs; Q is at least one of La, Ce, Sm or Th; wherein a dried control additive (DCCA) is added during the preparation process of the catalyst. The technical scheme better solves the problems. The preparation method can be used for industrial production of acrylaldehyde by using the acrylaldehyde.