When walking on the edge of a tall building's roof, you need to pay special attention to the following matters to ensure safety: 1. **Wear safety equipment**: including safety belts, safety ropes and other fall prevention equipment to prevent accidental falls. 2. **Pay attention to the surrounding environment**: Observe the weather conditions and avoid walking in bad weather such as strong winds, rain or snow. 3. **Stay focused**: Avoid distractions, do not use mobile phones and other devices, and concentrate on walking. 4. **Avoid the edge**: Try to stay away from the edge of the roof and avoid dangerous areas. 5. **Use guardrails**: If there are guardrails, be sure to move within the guardrails and ensure the stability of the guardrails. 6. **Conduct risk assessment**: Assess the structure of the roof and the ground conditions before walking, and pay attention to whether there are any damages, slippery surfaces, etc. 7. **Follow safety regulations**: Follow relevant safety standards and the unit's operating procedures. 8. **Keep in touch with others**: If you have a companion, make sure to keep in touch so that you can call for help in time in case of unexpected situations. 9. **Avoid wearing high heels or inappropriate shoes**: Wear suitable shoes to ensure safe walking. 10. **Don’t act alone**: Try to avoid being alone at high places, it is best to have a companion accompany you. Following the above precautions can effectively reduce the risk of walking on the roof of a high building. Safety first!