Method for fast preparing dimethyl ether steam reforming hydrogen production catalyst by virtue of alternate microwave

The invention discloses a method for fast preparing dimethyl ether steam reforming hydrogen production catalyst by virtue of alternate microwave. The method comprises the following steps: (1) preparing a mixed water solution of Cu(NO3)2 and M metal nitrate, wherein M metal is selected from iron, cobalt, nickel, manganese, lanthanum, chromium and zinc, the mol ratio of M:Cu in the mixed water solution is not less than 0 and not more than 1, and the total concentration range of Cu+M in the solution is 0.025mol/L-10.2mol/L; adding a carrier into the mixed water solution, and uniformly dispersing; (2) placing the mixed water solution in a microwave oven to alternatively heat; (3) drying the product obtained in the step (2), roasting to obtain a target catalyst. The method for preparing the dimethyl ether steam reforming hydrogen production catalyst is short in preparation time, low in energy consumption and easily controllable in process parameters; the prepared catalyst is high in reaction activity and good in selectivity; the prepared product is high in purity and good in quality; the catalyst can be used for in situ preparation of hydrogen.