Pain caused by lung cancer metastasis is the direct and indirect pain caused by the tissues and organs to which the cancer tissue has metastasized. The treatment methods for pain caused by metastasis of lung cancer are as follows: 1. Targeting the primary focus of lung cancer for treatment, metastasis of lung cancer will lose the chance of radical surgery, and the treatment methods are based on radiotherapy, chemotherapy, targeted therapy, local therapy and symptomatic pain treatment, etc. 2. When taking pain relief drugs, the principles to be followed include oral administration, timely administration, administration by steps, attention to specific details etc. The step dosing should be followed, with antipyretic and analgesic drugs as the 1st step dosing, weak opioid drugs as the 2nd step dosing, and strong opioid drugs as the 3rd step dosing.