Total cholesterol of 6.34mmol/L is high and requires prompt treatment. The normal reference level of total cholesterol is less than 5.2mmol/L, 5.2~6.2mmol/L is borderline level, and more than 6.2mmol/L is dangerous level. Therefore, the cholesterol level of 6.34mmol/L is serious, which greatly increases the risk of atherosclerotic diseases such as coronary heart disease, cerebral infarction and so on. In this case, the first step is to take lifestyle intervention, including quitting smoking and drinking, avoiding oily and high-salt diets, and taking appropriate physical exercise. If the effect of lifestyle intervention is unsatisfactory, statins such as atorvastatin, ezetimibe and kolestyramine can also be applied under the guidance of a doctor to assist in lowering lipids. It is recommended to consult a doctor for standardized diagnosis and treatment in a timely manner to avoid delaying the condition.