The invention discloses a synchronizer inner ring conical surface friction material bonding mold and bonding method thereof. The bonding mold is mainly formed by an upper mold, a lower mold and a heating mechanism, wherein the upper mold is provided with a discharging assembly and a floating assembly, and the lower mold is provided with a material butting assembly. Through the bonding mold, not only can pressurized heating bonding of a synchronizer inner ring conical surface subjected to prebonding of friction materials be achieved, but also automatic discharging and automatic material butting after bonding is finished can be achieved, uniformity of the heating effect is guaranteed, bonding efficiency is improved, adhesion influences of contact parts between an inner ring and the upper mold and between the inner ring and the lower mold are avoided, and bonding quality and production efficiency are improved.