Eating pig’s blood can not eliminate the dust in the lungs. Pig’s blood is a food with some nutritional value, after eating can supplement the body needs some nutrients. But pig’s blood does not have the effect of eliminating dust in the lungs, the folk so-called pig’s blood can clear the lungs in addition to the dust of the claim is no scientific basis, is not correct. Lungs are an important part of the respiratory system, in the process of breathing, individuals inhale some dust in the air, most of which will be removed through the nasal filter. At the same time, the lungs itself secretion, local cilia peristalsis and other defensive functions can also be through coughing and other ways to effectively remove the inhaled dust. Daily good respiratory care health care work, dusty environment to wear masks and other protective measures, such as respiratory symptoms should be timely medical care.