The utility model relates to a safety lighter which uses liquefied gas as fuel and is ignited by piezoelectricity, which comprises a casing, an air outlet assembly on the upper part of the casing, piezoelectricity on one side of the air outlet assembly, and a press handle on the piezoelectricity, wherein, a crow plate is arranged on the air outlet assembly; a piezoelectric push-rod is arranged on the upper end of the piezoelectricity. The safety lighter is characterized in that a power-assisted assembly is arranged between the piezoelectric push-rod and the press handle; one end of the power-assisted assembly is axially connected to the casing, and the middle and the other end are respectively matched with the piezoelectric push-rod and the press handle. When in use, under the action of the press handle, the power-assisted assembly is rotated. A lever principle is slickly used for increasing the stroke of the press handle, and the possibility that flame is generated when liquefied gas is ignited by the press handle because accidental force is reduced; meanwhile, labor saving effect is obtained.