Abstract: An apparatus is invented for forming a tire tread on the surface of a prototype tire that is pre-fabricated during the tire manufacturing processes. The apparatus for forming the tire comprises six forming devices disposed above the circular rotary base for securing the prototype tire, a transporting compression ring disposed around the rotary base for supplying and compressing an iron core belt onto the prototype tire of the forming device, and a first extruder, a second extruder, a third extruder, and a fourth extruder for extruding a ribbon-shaped rubber band to form a tire tread on the surface of the prototype tire. Accordingly, by constructing a plurality of extruders around the circular rotary base, the installation space can be smaller than the conventional prototype tire forming apparatus, the device fabricating cost can be reduced, and various shaped tires can be fabricated.