The invention discloses a flashlight with a light illumination device. The flashlight comprise a flashlight body (1), and is characterized in that a groove (4) for a lighter body (3) to embed is formed in the middle of the tail of a battery (2) of the flashlight body (1); the flashlight body (1) is hinged to the lighter body (3); the right side of the groove (4) in the flashlight body (1) is hinged to the left side of the top of the flashlight body (3) at a hinge position (5); an elastic clip (6) with a slot is arranged on the right side of the top of the lighter body (3); a bump (7) matched with the slot in the elastic clip (6) is arranged on the left side of the groove (4) in the flashlight body (1). The flashlight has the benefits that the flashlight has ignition and emergency lighting functions by setting the embedded lighter at the tail of the flashlight.