When hyperlipidemia is found, the first step should be dietary adjustment, improvement of lifestyle and control of the above-mentioned influencing factors. (1) System of high-fat foods: Strictly choose foods with low cholesterol content, such as vegetables, soy products, lean meat, jellyfish, etc. Especially, eating more vegetables containing more fiber can reduce the absorption of cholesterol in the intestine. However, the emphasis should not be one-sided on limiting the intake of high fat, because the intake of some essential fatty acids is beneficial to the body. A moderate intake of a diet containing more unsaturated fatty acids (controlling saturated fatty acids) is reasonable. Various vegetable oils, such as peanut oil, soybean oil and canola oil, are rich in polyunsaturated fatty acids, while animal oils, such as lard, suet and tallow, contain mainly saturated fatty acids. Food cholesterol all from animal oil food, egg yolk, animal offal, fish roe and brain, etc., containing high cholesterol, should be avoided or used sparingly. (2) change the way of cooking: cooking with less oil, try to steam, boil, cold mainly. Eat less fried food. (3) Limit sweets: sugar can be converted into endogenous triglycerides in the liver, which increases the concentration of triglycerides in the plasma, so the intake of sweets should be limited. (4) Quit smoking and drink less alcohol: moderate alcohol consumption can significantly increase HDL and decrease LDL levels in the serum. Therefore, moderate alcohol consumption can reduce the prevalence of coronary heart disease. Heavy or long-term alcohol consumption can stimulate the liver to synthesize more endogenous triglycerides and increase the concentration of LDL in the blood causing hypercholesterolemia. Therefore, it is better for middle-aged people to not drink alcohol. The incidence of coronary heart disease and death rate of smokers is 2-6 times higher than that of nonsmokers, and is proportional to the number of cigarettes smoked per day.