The invention relates to a medicament for treating long-term low-grade fever, which is prepared from Chinese herbs. The medicament is prepared from raw materials of radix codonopsitis, astragalus root, liquorice, rhizoma cimicifugae, Chinese angelica root, largehead atractylodes rhizome, szechwan lovage rhizome, cassia twig, Chinese magnolcavine fruit, roasted semen ziziphi spinosae, thinleaf milkwort root, and the like and can be prepared into capsules for use. The medicament warms yang, benefits qi, warms meridian, promotes blood circulation, has favorable curative effect on long-term low-grade fever, night sweat, and other symptoms and has no obvious side effects.