Premature ejaculation is a common disease in men, the clinical manifestation of which is mainly rapid ejaculation, usually less than a minute or even shorter, called premature ejaculation. Chinese medicine believes that there are many causes of premature ejaculation, including both kidney yin deficiency and kidney yang deficiency. The clinical manifestations of premature ejaculation caused by kidney yin deficiency are mainly rapid ejaculation, accompanied by soreness and weakness of the waist and knees, weakness, dry mouth, yellow urine, sweating, red tongue and thin white coating, etc. The clinical manifestations of premature ejaculation caused by kidney yang deficiency are not only rapid ejaculation, but also fear of cold and even unformed stools, and some patients have impotence. Therefore, to determine whether premature ejaculation is kidney yin deficiency or kidney yang deficiency, we need to combine the patient’s accompanying symptoms to make a judgment.