The invention discloses a Chinese medicinal composition for resisting trichomonas columbae disease. The Chinese medicinal composition comprises the following components by weight portion: 30 to 50 portions of houttuynia, 30 to 50 portions of fried baikal skullcap root, 25 to 40 portions of madder root, 25 to 40 portions of purple gromwell root, 15 to 30 portions of schizonepta, and 15 to 30 portions of bupleurum root. The invention also discloses a method for preparing an oral liquid of the Chinese medicinal composition. In the method, traditional Chinese medicaments are used to replace Western medicaments such as metronidazole, which are prohibited from being used for animal products, to facilitate the production of pollution-free foods. When a pigeon infects the trichomonas columbae disease, the pigeon can be better treated if taking the Chinese medicinal composition and the curative ratio is 93.33 percent, and the effectiveness ratio is 100 percent.