Asbestos is a carcinogenic substance, and long-term human exposure to asbestos may lead to malignant mesothelioma, etc. However, it is not certain how much asbestos inhaled will cause cancer, and it is mainly related to personal constitution. Asbestos itself is not toxic, but the main hazard is that asbestos dust will be deposited in the lungs after being inhaled for a long time, which may lead to lung fibrosis and pleural damage, and may cause lung cancer and malignant mesothelioma. However, it is not certain that malignant tumor will occur when inhaling asbestos. Some patients may be sensitive to asbestos, and short-term exposure and inhalation of a small amount of asbestos will lead to cancer quickly, such as 1-2 years. While some patients may not be sensitive to asbestos and their own detoxification and metabolic functions are stronger, it may take a certain amount of asbestos accumulation in the body for cancer to occur. Therefore, it is recommended that people who work with dust and belong to high-risk groups should routinely undergo annual chest CT examinations to screen for early lung cancer and facilitate early treatment.