The invention discloses a composition which can remove vinyl monomer, which contains at least one of primary amine, secondary amine or ammonia, and also contains a solvent. The composition of the invention also discloses a method by using the composition to remove vinyl monomer; the method is that: under a certain temperature T, the mixture of gas phase and liquid phase containing vinyl monomer which touches the composition through a reaction device to realize the purpose of absorbing vinyl monomer, thus the vinyl monomer in the mixture can be effectively removed finally. The invention has the advantages of low energy consumption and no discharging of greenhouse gases.