Oral liquids for treating secondary immunodeficiency diseases are Chinese patent medicines capable of effectively treating the secondary immunodeficiency diseases. A method A comprises steps as follows: effective ingredients of pokeberry roots, common selfheal fruit-spike, astragalus membranaceus, Chinese angelica, white peony roots, garlic and protein powder are extracted and mixed with fulvic acid, the mixture is put into a container, and an oral liquid is prepared. A method B comprises steps as follows: effective ingredients of gansui roots, pomegranate rind, golden thread, milkvetch roots, Chinese angelica and protein powder are extracted, mixed with fulvic acid and put into a container, and an oral liquid is prepared. A method C comprises steps as follows: effective ingredients of peking euphorbia roots, common selfheal fruit-spike, astragalus membranaceus, Chinese angelica, red dates and protein powder are extracted, mixed with fulvic acid and put into a container, and an oral liquid is prepared. Patients suffering from the secondary immunodeficiency disease can recover appetite, physical capacity and labor capacity as long as the patients take one of the oral liquids on schedule and at proper dose.