Pleural malignant tumor is mainly manifested as chest tightness, chest pain, emaciation, fever, lymph node enlargement and other symptoms, accompanied by different degrees of exudation phenomenon, if metastasis occurs, there will also be symptoms of metastatic site involvement. Pleural malignant tumors are mostly caused by primary tumors from other parts of the body metastasizing to the pleura, and there are also primary tumors of pleural mesothelioma originating from pleural mesothelial tissue. Patients with malignant pleural mesothelioma and pleural secondary tumors usually have the symptoms of chest tightness, chest pain, emaciation, and sometimes there are enlarged lymph nodes in supraclavicular fossa, axilla and other parts of the body, and some of the patients have the manifestation of low fever, and if combined with the infection, there can be high fever, and at the same time, the pleural exudation increases, and pleural effusion occurs. If the pleural malignant tumor has distant metastasis, it will also show the symptoms of the metastatic site. Such as lung metastasis, cough, asthma, hemoptysis, liver metastasis, abdominal pain, abdominal distension, bone metastasis, bone fracture and bone pain and other manifestations. The manifestations of pleural malignant tumors are more and more rapid growth, when the patient is not feeling well, he should go to the hospital for examination and diagnosis in time. The border of pleural malignant tumor is not clear and there is no complete envelope, it may spread and lymph node metastasis, so it needs to be detected and treated as early as possible to prolong the life and improve the quality of life.