Medicinal bath method is one of the external treatment method, that is, a method of bathing the whole body or local with medicinal solution or water containing medicinal solution, which has various forms: bathing the whole body called “medicinal bath”; local bathing and “scalding”, “fumigation “, “sitz bath”, “foot bath” and so on. Medicinal bath medication and internal medicine, as well as the need to follow the principles of prescription, identification of disease and evidence of drug selection. That is, according to their respective physique, time, place, condition and other factors, the use of different prescription drugs, each of their own. Chinese medicine hydrotherapy is a method of using Chinese medicine to relax the muscles, activate blood circulation and remove blood stasis, and use the physical properties of water to act on children with cerebral palsy in various ways to promote recovery. Herbal hydrotherapy is both an exercise therapy and a physical therapy. The role of herbal hydrotherapy in rehabilitation: 1. Lowering muscle tone, relieving muscle spasm, improving circulation, and promoting metabolism. 2.Regulate breathing, increase lung capacity, promote the development of laryngeal cartilage, and promote language development. 3. Increase muscle strength, increase joint mobility, improve balance. 4. Improve coordination and correct gait. 5. Increase children’s interest in training, improve mood and build self-confidence. 6. Develop children’s intelligence, language and personality.