The large gear ring is a main component of rotary kilns and ball mills, among which the rotary kiln large gear ring is one of the critical components in the rotary kiln transmission device. For this reason, strict quality requirements are imposed on large gear rings in actual production; otherwise, the operation progress of the equipment will be directly affected. Our factory manufactures cast large gear rings with targeted reinforcement and optimization based on the transmission characteristics of rotary kilns and ball mills. On the premise of ensuring the transmission stability of the equipment, we have also improved its load-bearing capacity and extended its service life.