The invention relates to the field of traditional Chinese medicines, in particular to a formula and preparation method of traditional Chinese medicine powder for treating allergic rhinitis and sinusitis. The traditional Chinese medicine powder is prepared from the following components: 5-30g of flos magnoliae, 2-30 g of radix angelicae dahuricae, 2-30 g of radix stemonae, 1-30 g of fructus arctii,1-30 g of fructus tribuli, 1-30 g of herba houttuyniae, 1-30 g of fructus evodiae, 1-20 g of periostracum cicadae, 1-30 g of fructus kochiae, 10-60 g of small centipeda herb, 5-30 g of herba schizonepetae, 5-30 g of radix scutellariae, 1-20 g of fructus mume and 5-30 g of fructus xanthii; the traditional Chinese medicine powder is a pure traditional Chinese medicine preparation, and the effects of promoting blood circulation, removing blood stasis, eliminating inflammation, swelling, strengthening the body, eliminating pathogenic factors, and repairing and health care are achieved; the environment-friendly traditional Chinese medicine preparation has no toxic side effects, and the trauma of operation and the damage of other antibiotic drugs are avoided; operation is simple and easy to operate, painless treatment is achieved, the key is good treatment effect, and relapse is not prone to occurring after recovery.