The invention relates to a treatment method of cracked gas produced by the production of low-carbon olefins. The method comprises the following steps: 1, under the condition of non-selective hydrogenation, at the presence of a hydrogenation catalyst, carrying out non-selective hydrogenation treatment on the cracked gas, and converting alkyne and dialkene in the cracked gas into mono-olefins and/or alkane, wherein the hydrogenation catalyst is a supported type Pt series catalyst using Pt and Ni as metal active components; and 2, enabling the cracked gas which is hydrogenated at the step 1 to carry out combustion reaction with air under the presence of a supported type Pd-Pt series catalyst, wherein the supported type Pd-Pt series catalyst uses Pd and Pt as metal active components. The method provided by the invention can better avoid the problem that the direction combustion of the cracked gas has potential safety danger, and the method is particularly suitable for petrochemical small-scale and pilot tests and is favorable to environmental protection.