The invention provides a hot plate type inclined plane guide segmented mould for preparing an all steel radial tire. The hot plate type inclined plane guide segmented mould comprises an upper tire side plate, a lower tire side plate and a pattern block which is positioned between the upper tire side plate and the lower tire side plate, is positioned at the same side of the upper tire side plate and the lower tire side plate, and is capable of forming a ring-shaped chamber with three closed surfaces and one open surface together with the upper tire side plate and the lower tire side plate; and a glue overflowing slot is formed in a fitted part between the upper tie side plate and the pattern block or/and the lower tire side plate and the pattern block. According to the hot plate type inclined plane guide segmented mold for preparing the all steel radial tire disclosed by the invention, the defects of a glue pressing side of a tire shoulder are obviously lowered, the labor intensity of a worker is relieved, the safety of operation staff is improved, the rubber side produced in a tire vulcanization process can be guided to the side edges of mould side plates, so that the clearing is easy, and the number of defective tires is reduced; meanwhile, the inherent quality of the tire is improved, the product qualified rate and the product quality are improved, and the dynamic balance yield is relatively high.