Metabolic acidosis is one of the common electrolyte balance disorders in clinic. It often occurs in various kidney diseases, diabetic ketoacidosis, lactic acidosis, etc. Severe acute metabolic acidosis can endanger life. The interaction between lung and kidney in human respiratory movement, body fluid metabolism and other aspects has a profound internal relationship, which is called "lung-kidney correlation" in traditional Chinese medicine. When metabolic acidosis occurs in human body for various reasons, the lung and kidney play an important role in compensatory regulation, which can be explained by the "lung-kidney correlation" theory. With regard to the treatment of metabolic acidosis, it is of great clinical value to combine traditional Chinese medicine with acid-correcting therapy to tonify the lung and kidney, to strengthen the functional state of the lungs and kidneys, and to enhance the self-regulation ability of the human body, so as to promote the recovery of the body"s function.