The main component of Tianyin yellow is Xanthophyll, which is stable and prepared by taking natural marigold flower as the raw material through the extraction, saponification and antioxidation process. Its main function is to improve the coloring of yolk, skin and foot shin of poultry and aquatic organisms. It is a natural plant colorant. The color quality of eggs can be changed by adding Tianyin yellow in the feed, so that the yolk, skin and others of poultry are golden yellow.