The invention discloses a detection method for bis((2-ethylhexyl)amine in leather and textiles. The detection method comprises the following steps: treating a sample, namely taking a sample to be detected, adding the sample to be detected into an organic solvent, and extracting to obtain extract liquor; and carrying out gas chromatography-mass spectrometry detection. The detection method disclosed by the invention is simple, convenient and rapid, methanol is preferably taken as an extraction agent, after extraction with methanol, bis((2-ethylhexyl)amine is subjected to chromatographic analysis once within 11min under the optimized detection condition, and a good separation effect can be obtained. The method has good linearity when the concentration range of bis((2-ethylhexyl)amine is of 0.1-10mg/L, the linearly dependent coefficient reaches 0.9998, the detection limit reaches 0.1mg/L, the repeatability relative standard deviation is less than 3%, and the sample adding standard recovery rate is 95%-110%, so that the detection method has good application prospect.