The existing building machines for heavy-duty three-drum tires come in two structures: a kind of three-drum two-chamber machine and a kind of three-drum three-chamber machine. The former utilizes a shared chamber for the belt drum and the building drum, boasting higher production efficiency due to its in-line bonding without radial movement; however, the significant distance between the building drum and the chamber leads to substantial deflection and makes independent adjustment impossible. This paper presents a belt drum correction structure, along with a bonding control method and control system, to address the aforementioned technical issues.