The invention provides an apparatus for detecting the cigarette ignition distance by using a linear sliding table. The apparatus comprises a servo motor, a linear sliding table and a cigarette clamper, wherein the cigarette clamper is positioned above the servo motor, a cigarette is clamped on the cigarette clamper, the servo motor is connected to the linear sliding table, the upper portion of the linear sliding table is provided with a sliding block, a photoelectric switch is fixedly connected on the sliding block, the side surface of the linear sliding table is provided with a slot, a first position limiting switch, a second position limiting switch and a zero switch are installed in the slot, and the servo motor is connected to an encoder. According to the present invention, the servo motor is used to drive the sliding block on the linear sliding table to drive the photoelectric switch to move along the cigarette clamping direction, the sliding block moves from the position of the zero switch, the operation of the servo motor is stopped when the photoelectric switch detects the front end surface of the cigarette, and the moving distance of the sliding block is obtained through the encoder, such that the staff can accurately set the position of the ignition element on other working positions according to the detected distance so as to achieve the accurate ignition of the cigarette.