Preparation method of N-formamide compound

The invention relates to a preparation method of N-formamide compounds, which comprises the following steps of: using halides and formamide as raw materials, reacting under the heating backflow for 3-10 hours under the conditions of solvent or no solvent, acid-binding agent and catalyst or no catalyst, and after reaction, conducting post-treatment such as extraction to reaction liquid to obtain the N-formamide compounds, wherein the ratio of amount of substance of the halides to amount of substance of the formamide is 1: (1-100) and the reaction is preferably conducted under the condition of no solvent. The preparation method provided by the invention has the advantages of high yield, convenience in post-treatment, low catalyst cost, simpleness in operation, moderate condition, easiness in reaction control, smaller quantity of three kinds of produced wastes (waste gas, waste water and waste residue), small risk and the like, and is suitable for industrial production.