The invention relates to a production method of air variable yarn. The method includes: a group of color spinning includes 3 color spinning yarns, which are the main color yarn, auxiliary color yarn and embellishment color yarn, the main color yarn is 75D / 36F FDY, and the color of the main color yarn is one of the following colors Types: red, blue, light blue, gray, beige, the auxiliary color yarn is 50D / 36F FDY, the color standard of the auxiliary color yarn is based on the color of the main color yarn, and the difference in lightness and darkness is increased by 20 , the red-green difference value shifts to the green direction by ‑1, the yellow-blue difference value shifts to the yellow direction by 1, the color saturation remains unchanged, the dotted color thread is 30D / 24F FDY, and the color of the dotted color thread is one of the following colors Types: black, brown, white, using the above three color spinning to make air variable yarn. Three color spinning yarns are used to produce air variable yarns, so that the produced air variable yarns have higher strength and better stability in the production process. And quantify the color selection of the three color spinning. In this way, the selection time of color spinning can be significantly reduced, which is conducive to improving production efficiency.