The invention relates to a method for prolonging the first generation furnace life of a blast furnace, and belongs to the technical field of blast furnace equipment maintenance. By adopting the maintenance technology such as opening an iron opening gate, replacing a refractory lining at a hearth, replacing a furnace body and hearth burning cooling wall and dealing with gas leakage of a furnace shell, and blast furnace equipment can be repaired quickly and restored to a normal state. The practice shows that the maintenance process only requires to invest 42 million funds, and the time from shutdown to production and maintenance is 25 days. The method for prolonging the first generation furnace life of the blast furnace has been applied in a smelting blast furnace of large vanadium-titaniummagnetite in Panzhihua steel, wherein a 1 # blast furnace and a 4 # blast furnace reach the first generation furnace life for 15 years and 14.5 years, the first generation furnace life for the blast furnace can be extended for 4 to 5 years, and a miracle of the first generation furnace life for the large vanadium-titanium magnetite smelting blast furnace in China is created.