Pu 'er tea is warm, which warms the stomach without hurting the stomach, especially for cooked tea. The post-fermentation of Pu 'er tea is a series of complex changes in enzymatic oxidation and microbial activity. People with strong liver fire are easily excited or impulsive and irritable, which is suitable for drinking to reduce fire. Four cups of Pu 'er tea a day can relieve itchy or acne-prone skin, and symptoms of deficiency fire such as dry mouth or bitter taste will be gradually eliminated. In the study of the influence of Pu 'er tea on blood pressure, heart rate and rheoencephalogram, He Guofan and Lin Yuechan believe that the physiological state of cerebral blood vessels and cerebral hemodynamics have changed after drinking Pu 'er tea. Data show that drinking Pu 'er tea may have the effects of lowering blood lipid, improving insulin resistance and preventing cardiovascular diseases. The results of in vitro and animal experiments show that Pu 'er tea extract has obvious antioxidant activity, scavenging free radicals, reducing the content of unsaturated fatty acids in LDI and increasing the content of tocopherol in low-density lipoprotein, thus reducing the oxidation sensitivity of low-density lipoprotein. It is concluded that drinking Pu 'er tea can prevent atherosclerosis and cardiovascular diseases. Killing cancer cells is powerful. Experiments show that Pu 'er tea contains rich anti-pain trace components, such as Q- carotene, vitamin B 1, B2, C, E and so on. In the process of drinking Pu 'er tea, caffeine has many positive effects on human body.