The invention discloses a composite Chinese herbal feed additive premix for preventing and treating discoloration of Pelteobagrus fulvidraco, comprising following materials by weight: based on per ton of feed, 1200-2500g of rheum officinale, 300-1600g of root of red-rooted salvia, 500-350g of marigold, 1000-3000g of silybum marianum, 300-1800g of pseudo-ginseng, 600-2200g of radix scutellariae, 800-1200g of golden cypress, 1000-1500g of astragalus mongholicus, 1000-3000g of motherwort, 800-4000g of garlic and 1000-3000g of hawthorn, wherein the adding weight of the composite Chinese herbal feed additive premix in per ton of Pelteobagrus fulvidraco compound feed is 10-20kg. The premix is optimized after large-scale productive experiments in several years so as to be safe and effective in long-term use and has no toxic side effects; and the immune function and anti-stress capability of the Pelteobagrus fulvidraco cultivated on a high-density intensive condition can be notably improved. Many experiments show that the serum lysozyme activity, macrophage phagocytic ability and serum complement energy of the Pelteobagrus fulvidraco are improved after the Pelteobagrus fulvidraco eats feed with the additive premix. The bred Pelteobagrus fulvidraco has high survival rate, bright and natural body color, strong anti-stress capability and low feed coefficient.