The invention discloses a rapid screening method of four kinds of primary aromatic amines in toys. The method comprises placing a sample to be tested in a carrier containing an extraction solvent, applying high pressure to form electron spray and carrying out on-line analysis in real time according to an ion mobility spectrum. The four kinds of primary aromatic amines comprise 2-naphthylamine, 4-chloro-2-methylaniline, 4-aminobphenyl and benzidine. The method has the advantages of fastness, stability, low cost and simple operation.