Qualitative identification method of natural colored cotton product

The invention relates to the field of cotton detection and discloses a qualitative identification method of a natural colored cotton product. The qualitative identification method comprises the following steps: 1) pre-treating: immersing a sample to be detected into an activating solution and activating; 2) carrying out color development treatment: preparing an n-butanol solution of 3-(4'-methoxy)phenylacrolein and taking the n-butanol solution as a color development solution, immersing the sample to be detected into the color development solution and reacting; 3) carrying out qualitative identification: after carrying out the color development treatment, observing the color change of the sample to be detected; if the color of the sample to be detected is changed into rosy red or purple red, judging that the sample to be detected is the natural colored cotton product; if the color of the sample to be detected is not changed or is changed into other colors, judging that the sample to be detected is a dyed prod