中药归经理论是中药药性理论的重要组成部分。该理论的形成、可追溯到《内经》的脏腑、经络、药理学说。《素问·至真要大论》云:“夫五味入胃,各归所喜。入肝、苦先人心、甘先入脾、辛先入肺、咸先入肾”,可视为归经理论之先声。至《伤寒论》六经分经用药,为归经理论的形成奠定了基础,但是明确提出某药入某经,却是始于金元时代。易水学派的开山张元素在其所 The traditional Chinese medicine Guiding Theory is an important part of the traditional Chinese medicine property theory. The formation of this theory can be traced back to the internal organs, organs, meridians and pharmacology. “Su asked to really talk about the big” cloud: “Five flavors into the stomach, each belong to the hi. Into the liver, bitterness first, Gan first into the spleen, Xin first into the lung, salt first into the kidney,” can be regarded as the theory of First. To the “Treatise on Febrile Diseases,” the six meridians were used to provide the basis for the formation of the theory of return to nature. However, it was clearly stated that the introduction of a certain drug into a certain period began in the Jin-Yuan period. Yi Shui School’s Kaishan Zhang elements are in its place.