Mold for forming hollow foaming tire and method for manufacturing hollow foaming tire

The invention discloses a mold for forming a hollow foaming tire. The mold comprises an upper mold, a lower mold and a movable mold core, wherein the upper mold and the lower mold are matched with each other in a mold opening or mold closing mode, and a matching cavity is jointly defined by the upper mold and the lower mold in the mold closing process; the movable mold core is movably mounted at the upper mold or the lower mold and located in the matching cavity during mold closing, the movable mold core is provided with an outer convex ring which protrudes towards a side cavity wall close to the matching cavity in the radial direction during mold closing, the outer convex ring enables the matching cavity to define an annular forming cavity used for forming a hollow foaming tire primary product, and the cross section outline of the annular forming cavity is in a ring shape with the head and the tail opened and the opened position located on the inner side; in the mold opening process, the movable mold core an