The invention discloses a Chinese medicinal preparation for treating allergic rhinitis, allergic asthma and urticaria and a preparation method thereof. The Chinese medicinal preparation comprises the following main raw material medicaments in part by weight: 4 to 36 parts of bupleurum, 5 to 30 parts of root of red-rooted salvia, 4 to 28 parts of paniculate swallowwort root, 4 to 28 parts of cicada slough, 6 to 32 parts of dry rehmannia root and 4 to 28 parts of ligusticum sinense oliver. The preparation method comprises the following steps of: 1, cleaning the medicinal materials with water; 2, drying the medicinal materials, crushing into medicinal powder of 100 to 200 meshes, uniformly mixing, soaking, decocting twice, filtering out, and mixing to obtain an active extract; when filtrate becomes thick paste with the concentration density of between 1.30 and 1.35, drying, and crushing into medicinal powder of 100 to 200 meshes to obtain powder; and 3, adding auxiliary materials, and preparing into capsules, tablets and the like. The Chinese medicinal preparation has the effects of resisting inflammation, resisting allergy and improving microcirculation, improves allergic body diathesis, improves resisting capability of a human body to allergens, and has obvious effects on the allergic rhinitis, the allergic asthma and the urticaria, short treatment cycle and low recurrence rate.