Synthesis method of N, N-dimethyl trifluoromethanesulfonamide

The invention discloses a synthesis method of N, N-dimethyl trifluoromethanesulfonamide, and relates to the technical field of battery electrolyte additives, and the synthesis method comprises the following steps: taking trifluoromethanesulfonyl fluoride and dimethylamine, and carrying out amidation reaction under the condition of 0.1-0.5 MPa to obtain the N, N-dimethyl trifluoromethanesulfonamide. The preparation method comprises the following steps: taking trifluoromethanesulfonyl fluoride and dimethylamine as raw materials, and directly carrying out amidation reaction; the reaction process is simple, raw materials used in the reaction are easy to obtain, the reaction process is milder and safer compared with the prior art, the product yield and product purity maximization in the production process are guaranteed through control over reaction conditions in all stages, the product yield is further increased by reasonably controlling the use amount of the reaction raw materials and the reaction process, the yield reaches 88.29% or above, and the purity reaches 99.5% or above.