In today’s era of information explosion, health care information is very easy to receive attention, influenced by traditional culture, people generally prefer to receive those food to help disease information, especially in the prevention of malignant tumors, more attention, many with induced information is a certain person because of long-term consumption of what food results in how long life, so-and-so had cancer, due to the use of what, now still alive and so on. Individual differences in disease and longevity are very large, and it is very difficult to promote individual health and longevity in a generalized way, and promotion must be based on population studies. It is very difficult to evaluate the effect of a food or drug on the occurrence, progression and prolongation of life expectancy of cancer, and the author has long been concerned about the progress of any sensitivity studies on food for liver disease. To date, there is no scientific evidence that any grains, meats, vegetables, or fruit groups have been shown to be beneficial for liver cancer. A study conducted by scholars at the Norris Comprehensive Cancer Center at the University of Southern California found that coffee consumption reduces the risk of liver cancer and chronic liver disease in ethnic minorities in the United States. The article was recently published in Gastroenterology, one of the world’s top journals. The prospective cohort study included more than 215,000 volunteers from different ethnic groups in the U.S. Volunteers were asked to report coffee intake in addition to other dietary, lifestyle and other relevant factors. During 18 years of follow-up, 451 volunteers developed liver cancer and 654 volunteers died of chronic liver disease. Cox regression analysis was used to calculate the relative risk ratio (RR) and 95% confidence interval (95% CI). The results of the study showed that coffee consumption significantly reduced the incidence of liver cancer and the mortality rate of chronic liver disease (P<0.0002). Compared to non-coffee drinkers, volunteers who drank 2-3 cups of coffee per day had a 38% reduction in the incidence of liver cancer and a 46% reduction in mortality from chronic liver disease, while volunteers who drank more than 4 cups of coffee per day had a 41% reduction in the incidence of liver cancer and a 71% reduction in mortality from chronic liver disease. The study also found that coffee intake was inversely associated with liver cancer and chronic liver disease, but not significantly different from the volunteers' race, gender, body mass index, smoking, alcohol use and diabetes (P≥0.11). The credibility of this study is very high and lies in the rigor and scientific nature of its study design. It is a research result worth promoting. Recommendations 1, pay attention to the amount of coffee, here a cup, refers to the standard coffee cup volume, about 150ml-200ml. 2, pay attention to the relationship with other diseases, there are reports in the literature that drinking more coffee may be detrimental to cardiovascular disease, for this reason, the authors, in the same rigorous attitude, reviewed a large number of professional literature, there are no scientific reports that drinking coffee is detrimental to the human body. However, due to the role of caffeine, there is a risk of inducing a faster pulse, arrhythmia and other diseases, pregnant women, elderly women, suffering from severe stomach disease, hypertension, coronary heart disease, atherosclerosis, cancer and vitamin B1 deficiency need to be cautious. 3, the national people drink coffee very like to add sugar, the coffee into sugar water, although sugar does not reduce the positive effect of coffee, but long-term excessive intake of sugar is certainly not good for health. So it is recommended to drink original coffee.