There is no essential change in the efficacy of Eucommia bark when it is concocted or not concocted, but the effect of concocted Eucommia bark in tonifying the liver and kidney has been enhanced. It is sweet in flavor and warm in nature; it belongs to the liver and kidney meridians, and has the effects of tonifying the liver and kidney, strengthening the muscles and bones, and stabilizing the fetus, etc. At present, salted eucommia is the main concoction of eucommia. At present, salted Cortex Eucommiae is the main concoction of Cortex Eucommiae, and its effect of tonifying the liver and kidney has been enhanced after salting, but there is no essential difference in the efficacy. Clinically, Cortex Eucommia can be used to treat many diseases caused by deficiency of liver and kidney, such as lumbar and knee pain, weakness of muscles and bones, dizziness and dizziness, and leakage of blood in pregnancy, and restlessness of fetus. Because of its warm nature, it should be used with caution by people with yin deficiency and fire (deficiency of yin and essence in the body, resulting in hyperactive fire). The application of Chinese medicine should be carried out under the guidance of a physician’s diagnosis, and should not be used on its own.