The invention relates to a Chinese herbal medicine additive for promoting growth of laying hens and improving egg quality and a feeding method thereof. The additive is prepared from the following Chinese herbal medicines in parts by weight of 2-4 parts of radix astragali, 1.5-3.5 parts of poria cocos, 1-3 parts of radix isatidis, 1-3 parts of radix codcnopsitis pilosulas, 1-2.5 parts of radix glycyrrhizae, 2-4 parts of fructus crataegi, 3-5 parts of rhizoma dioscoreae, 3-5 parts of fructus hordei germinatus, 1-2 parts of massa medicata fermentata, 1-2 parts of agastache rugosus, 1-2 parts of pericarpium citri reticulatae and 1-2.5 parts of herba ephedrae. Various Chinese herbal medicines are ground and sieved, and the sieved materials are mixed to obtain a mixture, namely the Chinese herbal medicine additive. 2 kg of the additive is added into every 100 kg of chicken compound feed according to the weight ratio to obtain chicken feed. 10-36 g of the chicken feed is used for feeding eachbrooding chicken every day, 40-80 g of the chicken feed is used for feeding each growing chicken every day, and 85-120 g of the chicken feed is used for feeding each laying hen every day. The additive has the characteristics of strong safety, small toxic and side effects and low residue, avoids tolerance of livestock and poultry to the additive, and basically realizes antibiotic-free breeding.