The ZCX3 all-steel one-step three drums building machine purchased by our company early, the shoulder pad rubber adopts manual feeding method, which is low in efficiency and has certain quality risks. In order to improve the tire quality and the degree of automation of the building machine, a fully automatic shoulder pad rubber supply rack was designed. The shoulder pad rubber can be reeled and supplied by the I-shaped wheel, automatically guided, cut to length, and conveyed and bonded, which greatly improves the bonding quality and production efficiency. By improving the turnover form of bookleaf carriage, the purpose of improving quality, reducing consumption, and reducing staff and increasing efficiency can be achieved.