The 5-year survival rate of lung adenocarcinoma after standardized treatment is about 60%, and the specific survival time should be judged according to the patient’s own condition, pathological type and treatment effect. In addition to staging, the pathological differentiation of the tumor is also an important factor affecting the survival of patients. Lung adenocarcinoma is classified into 5 types: walled type is highly differentiated, alveolar type and papillary type are moderately differentiated, micropapillary type and solid type are poorly differentiated. Lowly differentiated lung adenocarcinomas usually do not have glandular structure, are solid and striated, and the cellular anisotropy is more obvious. It is generally believed that the lower the differentiation, the higher the degree of malignancy, and conversely, the higher the differentiation, the lower the degree of malignancy. Treatment effect also affects the survival period. If patients have clean surgical resection and receive standardized postoperative adjuvant treatment to further clear the possible residual cancer cells in the body, they can have a better survival period. Lung adenocarcinoma patients should pay attention to regular and nutritious diet, consume more food high in vitamin C, prohibit smoking and limit alcohol, exercise moderately according to doctor’s instructions, prevent infection, have regular checkups, and consult the doctor in time when any uncomfortable symptoms appear.