The invention discloses a traditional Chinese medicinal composition for treating damp arthralgia and a preparation method thereof. The traditional Chinese medicinal composition of the invention is prepared from the following medicinal materials: heracleum, root of largeleaf gentian, clematis root, szechuan lovage rhizome, turmeric, cassia twig, kempas, cortex acanthopanacis and the like. The traditional Chinese medicinal composition has the effects of dispelling the wind, dehumidifying, activating blood, freeing channels, promoting qi circulation and relieving pain and can be used for treat damp arthralgia as well as scapulohumeral periarthritis, arthritis and pain in cervical vertebra. In preparation, the heracleum, clematis root, szechuan lovage rhizome, turmeric, cassia twig and kempas are added into ethanol for alcohol extraction; the extract is concentrated and stood for dimixing and an oil layer and a water layer are obtained; the root of largeleaf gentian and the cortex acanthopanacis are added with water for extraction, the extract is concentrated and subjected to alcohol precipitation, and alcohol solution is collected; and the oil layer, the alcohol extract and medical auxiliary material are mixed, and auxiliary materials are added and uniformly mixed to prepare the preparation. The method can effectively extract the active ingredients of the medicaments and preparing the preparation with the extracts for treating damp arthralgia.