The invention relates to a microwave preparation method of electro catalyst with low Pt content, belonging to electro catalysis for fuel cell field. The invention comprises following steps: 1 to 20 parts by weight(pbw) of carbon powder is high energy ball milled after being thoroughly dried, 20 to 400 pbw of H2O2 is then used for reflux, the carbon powder is dried after being washed with de-ionized water, and the carbon after pretreatment can be obtained after natural cooling; the precursor chloroplatinic acid, nickel acetate solution, TiO2 nano-tube powder and carbon are put into a flask, after the pH value is adjusted by adding glycol solution, the mixture is mixed uniformly by ultrasound, wherein, the mass content of Pt is 2.5 to 20%, the mass content of Ni is 2.5 to 20%, the mass content of TiO2 nano-tube powder is 5 to 30%; the mixed solution is then put into a microwave reactor with a condensation and reflux device for thermal reaction, when the reaction is finished, the electro catalyst can be obtained from the mixed solution after being laid aside, filtered, water washes, vacuum dried and grinded. The invention has the advantages of mild and controllable conditions, short reaction time, simple operation and green revolution.