During the production of the 1 900 mm double flow slab continuous casting machine in Tangshan Iron and Steel New Area,there are many problems with the automatic casting slab tracking and operation control system,especially with the stacking and unloading platform equipment.By adjusting the accuracy of equipment installation,detecting instruments and improving control programs,the stacking and unloading platform systems can be put into normal use,and the casting billet tracking system can achieve automatic operation.