Lung cancer bone metastases can be diagnosed by a puncture biopsy, but it is not necessary to have a puncture biopsy to confirm the diagnosis. Puncture biopsy is the gold standard for confirming the diagnosis of malignant tumor as well as metastasis. At present, it can be taken to carry out pathological examination after localized mass excision, and it can also choose to extract diseased bone tissues for biopsy, and once metastasis is found, treatment should be carried out as early as possible. In addition, in order to accurately analyze whether lung cancer has bone metastasis or not, radionuclide bone scanning, PET-CT and other examinations can be done, which can be combined with the patient’s condition and symptoms to make a comprehensive judgment. When bone metastasis of lung cancer occurs, one should consult a doctor in time and choose the appropriate treatment method under the guidance of a professional doctor, so as to avoid delaying the condition.