The invention provides an oral Chinese herbal preparation for treating gingivitis, which comprises the following raw materials in parts by weight: 10-20 parts of angelica, 10-20 parts of indigo naturalis, 10-20 parts of salvia miltiorrhiza, 10-20 parts of cortex lycii radicis, 10-20 parts of radix notoginseng, 10-20 parts of radix angelicae, 10-20 parts of notopterygium root, 10-20 parts of areca catechu, 10-20 parts of honeysuckle, 10-20 parts of gardenia, 10-20 parts of scutellaria baicalensis, 10-20 parts of golden cypress, 10-20 parts of borneol, 10-20 parts of mint and 10-20 parts of patrinia. The Chinese herbal preparation is capable of clearing heat, removing toxin, relieving bruises and pains, promoting tissue regeneration, and astringing to arrest bleeding, has a better treatment effect on gingivitis, and has the advantages of rich medicine sources, low price, small side effect and the like; therefore, Chinese herbal mouthwash has a stronger clinical effect of combining all the medicines, and has the functions of clearing heat, purging fire, nourishing yin, falling fire, dredging collaterals, and relieving pain.