The invention discloses an electronic product protective sleeve provided with a flashlight. The protective sleeve comprises a protective sleeve casing, a photosensitive element, at least one light-emitting element and a control circuit driving the light-emitting elements to flash, wherein the photosensitive element, the light-emitting elements and the control circuit are fixed on the protective sleeve casing; when a mobile phone is matched inside the protective sleeve casing, the position of the photosensitive element corresponds to the position of a flashlight of the mobile phone; and the flashlight of the mobile phone triggers the photosensitive element so as to trigger the control circuit to drive the light-emitting elements to flash. According to the protective sleeve, a design of integration of the flashlight with the protective sleeve of the mobile phone is adopted, so that the protective sleeve is small in size and convenient to carry; the protective sleeve is triggered through the flashlight of the original mobile phone, is quick in reaction speed and synchronizes with the flashlight of the original mobile phone, no software is required to be installed in the mobile phone, and an operation mode is identical with that of the original mobile phone; an independent battery is arranged inside, power supplied to the mobile phone is not affected, when the flashlight does not work, the quiescent current is extremely small, and the working time is greatly prolonged.