The utility model discloses a tire self-repairer with inflating and fire extinguishing functions, which comprises a high-pressure tank, wherein a safety valve is arranged on the upper portion of the high-pressure tank and provided with a safety valve starting handle and a three-way valve, the three-way valve is communicated to a fire extinguishing nozzle and an inflating pipe, a valve connector is arranged at the top end of the inflating pipe, and tire cement which is 1/4-1/3 of the volume of the high-pressure tank and incombustible gas are filled in the high-pressure tank. The tire self-repairer is simple in structure, convenient for using and operation and easy to fill tire cement into tires and complete inflating operation while filling the tire cement. When used for small fire, cement can be quickly ejected out to form an incombustible coating covered on surfaces of the fired objects once the safety valve is opened, thereby realizing a fire extinguishing function.