The invention provides a heavy-load radial tire and a manufacturing method, and relates to the field of radial tires, the heavy-load radial tire comprises a tread, a sidewall and a tire body, the sidewall is connected with the tread and toe wear-resistant rubber, and the toe wear-resistant rubber is connected with a lining after bypassing a steel wire ring; a belted layer outer reinforcing layer, a belted layer and a belted layer inner reinforcing layer are sequentially arranged between the tread and the tire body; one end of the belted layer inner reinforcing layer is in lap joint with the belted layer, and the other end extends to the sidewall; the belted layer is covered with the belted layer outer reinforcing layer, the end of the belted layer outer reinforcing layer extends to the tire shoulder, and the belted layer outer reinforcing layer and the belted layer inner reinforcing layer are attached to the tire shoulder. In order to solve the problem of shoulder empty disease at the tire shoulder position under heavy load at present, the inner reinforcing layer and the outer reinforcing layer are respectively arranged on two sides of the belted layer and are attached to the tire shoulder position, one end of the inner reinforcing layer is in lap joint with the belted layer, and the other end of the inner reinforcing layer extends to the tire side, so that the strength of the tire shoulder is improved, and the occurrence risk of shoulder crown empty quality disease is reduced.

本发明提供一种重载子午线轮胎及制作方法，涉及子午线轮胎领域，包括胎面、胎侧和胎体，胎侧连接胎面和趾口耐磨胶，趾口耐磨胶绕过钢丝圈后连接内衬；胎面与胎体之间依次设有带束层外加强层、带束层和带束层内加强层；带束层内加强层一端与带束层搭接，另一端延伸至胎侧；带束层外加强层覆盖带束层且端部延伸至胎肩处，带束层外加强层与带束层内加强层于胎肩处贴合。针对目前重载下胎肩位置存在肩空病象的问题，在带束层的两侧分别设置内加强层和外加强层，并将其在胎肩位置进行贴合，内加强层一端搭接带束层，另一端延伸至胎侧，从而提高胎肩的强度，降低肩冠空质量病象的发生风险。