The scrap metal shredding system is a large scrap metal recycling equipment line that is comprised of the feeding conveyor, scrap metal main shredding machine, discharge conveyor, sorting system, centralized dust removal system, and control distribution cabinet. It is designed to carry out one time crushing and kneading operations of scrap iron sheets, metal briquetting, bicycle, motorcycle, ring pull can and other thin scrap metal materials. In addition, it will separate metal from non-metal in the scrap steel, as well as separate aluminum and copper from the iron. The shredded materials can then be used for steel making, thus achieving an efficient recycling and reuse of the scrap metal.