The invention discloses a pressure-regulating dual anti-burst tire safety valve, relating to the improvement of a tire inflating valve. The safety valve is characterized in that the valve body is fixedly matched with a dust-proof cap in a thread mode; the dust-proof cap is provided with a vent hole; a core is installed in a ventilation channel in the valve body through a limit groove; a core cap with the limit groove is fixed on the upper part in the valve body through the threads; a core bar is fixed on the center line of the inner cavity of the core; the core bar penetrates through the core cap and is matched with the core cap in a sliding mode; a pressure limiting spring is arranged outside the core bar and in the limit groove of the core cap; and top end of the core cap is provided with transversely protruded cap outer edge. The safety valve has the beneficial effects of making up the anti-burst tire function which the existing inflating valve does not have and overcoming the defect that the inflating valve bursts under the action of pressure, thereby not only inflating tires, but also regulating and discharging pressure for the tires to ensure the normal working pressure of the tires, prolonging the service life of the tires, saving fuels, and preventing accidents due to tire burst and valve burst.