The invention discloses improved capsules capable of tonifying yin and clearing away deficient heat. Powder contained in the capsules is a composition prepared by mixing, by dry weight, 0.8-3 parts of radix rehmanniae preparata, 1-2.5 parts of radix rehmanniae, 0.8-3 parts of radix codonopsis, 0.5-2.5 parts of radix adenophorae and 0.6-2.5 parts of radix ophiopogonis. On the basis, Chinese wolfberry fruits, cornus officinalis, semen cuscutae, spina date seeds, herba epimedii, human placenta, cortex lycii radicis, cortex moutan and rhizoma alismatis can be selectively added according to different types of diseases and the severe degree to form different compounds. By adjusting the medicinal herb composition and removing unreasonable medicinal herbs on the original basis, the improved capsules are better in medicinal effect and have a significant effect on fire excess from yin deficiency, climacteric syndromes, deficiency of liver-yin and kidney-yin, soreness and weakness of the waist and knees, weakness of the spleen and the stomach, reduced appetite and shortness of breath, dizziness, restlessness, heat and dryness in blood, skin itch, dysphoria and insomnia, insomnia and dreaminess, deficiency of blood and chlorosis, steaming sensation in the bone, burning hot legs and feet, blurred vision and tinnitus, deficiency of yin and hectic fever, and spontaneous sweat and night sweating, no toxic or side effect exists, and the effective rate reaches 98% or above.