The invention discloses a traditional Chinese medicine preparation for treating non-tuberculous hydrothorax, aiming to provide a traditional Chinese medicine preparation which is suitable for long-term administration and has the advantages of regulating functions of a human body, addressing the symptoms and the root causes of the non-tuberculous hydrothorax, fundamentally damaging a lesion for generating hydrothorax and radically treating the hydrothorax. The traditional Chinese medicine preparation for treating the non-tuberculous hydrothorax comprises all traditional Chinese medicine preparations which are suitable for clinical oral administration. The traditional Chinese medicine preparation comprises the following Chinese medicinal materials in parts by weight: 10-30 parts of radix knoxiae, 10-30 parts of lilac daphne, 10-50 parts of euphorbia kansui and 250-1000 parts of jujube flesh powder. An oral preparation suitable for clinical application is prepared by crushing the Chinese medicinal materials in a mixing mode according to the traditional process of traditional Chinese medicine preparation. The invention is suitable for long-term administration and has no toxic or side effect and low treatment cost and can address the symptoms and the root causes of the non-tuberculous hydrothorax.