The invention discloses a catalyst for dimethyl ether catalytic combustion and the preparation method and the application. The catalyst is that: firstly, manganese oxide octahedron molecular sieve can be prepared by an oxidation-reduction method, then a third metal component Fe, Ni, Cu, Ce or Cr are loaded. The catalyst of the invention is suitable for the dimethyl ether catalytic combustion, when the volume ratio of air or air mixture and dimethyl ether is 50, the dimethyl ether is entirely catalyzed to combust at the temperature ranging from 150 to 375 DEG C; the invention provides a cheap,efficient and clean catalyst for the catalytic combustion of the clean energy dimethyl ether, can reduce combustion temperature, decrease pollutant discharge and improve the using efficiency of energy.