Lung mucinous adenocarcinoma is generally not sensitive to chemotherapy. Lung mucinous adenocarcinoma is a kind of lung cancer, a relatively common malignant tumor, which is not very sensitive to chemotherapy, and can be treated by surgery as far as possible. Once diagnosed, lung mucinous adenocarcinoma should be treated with radical surgery as early as possible. After surgery, in order to control the development of the disease or further kill the tumor cells, it can also be treated by chemotherapy, which is not sensitive but has certain therapeutic effect. In the process of chemotherapy, as the course of treatment increases, drug-resistant strains will easily be produced, and the later the chemotherapy becomes less sensitive, generally the effective rate of second-line chemotherapy is relatively low. Lung mucinous adenocarcinoma should actively cooperate with doctors to control the development of the disease.