Phellodendron belongs to the class of Chinese herbs that nourish the heart and tranquilize the mind. It enters the heart, kidney and large intestine meridians, is sweet in taste and flat in nature, and has the effects of tranquilizing the mind, nourishing the heart, astringing sweat, and laxative. In clinical practice, for heart yin deficiency, heart blood deficiency, heart and soul loss of palpitations, insomnia, dizziness, forgetfulness, etc., can be used with sour date, angelica, Fu Shen, maitake, calamus; for yin and blood deficiency, old age, postpartum constipation of intestinal dryness, can be used with Yu Li Ren, pine nuts, almonds, black sesame, fire hemp kernel. Modern pharmacological studies have shown that: 1. cypress kernel has a sedative effect. 2. cypress kernel contains a large amount of fatty oil, which has a moderate laxative effect. 3. aqueous and ethanolic extracts of cypress kernel have an ameliorating effect on memory storage impairment caused by scopolamine in the jumping test, and can significantly improve memory consolidation impairment caused by electroconvulsion and shock in the jumping test.