Protective fence can be divided into two types according to the production characteristics. One is welded mesh guardrail, the other is chain link fence. Both protective fence are widely used in protection. Welded mesh guardrail is made by welding iron wire, cold galvanized iron wire or hot-dip galvanized iron wire wire through welding machine, and then through bending, plastic spraying, PVC and other processes. It has the characteristics of corrosion resistance, beautiful appearance and effective protection. Chain link fence is a metal wire made of various materials through chain link machine, including PVC wire, hot and cold zinc plated wire, etc. Compiled. It has the characteristics of strong impact resistance, beautiful appearance, corrosion resistance and good protection.