The invention discloses an integrated drill stem clamping and mounting-dismounting device for a core drilling machine. The integrated drill stem clamping and mounting-dismounting device is equipped with an upper holder, wherein the upper holder comprises an upper holder housing; a core tube is arranged in the upper holder housing; a lower holder is arranged below the core tube; the lower holder comprises a base, a roller wheel blocking component is arranged inside the base, and a hydraulic oil cylinder is arranged outside the base of the lower holder; the top of the base is upwards equipped with a sleeve which is arranged on the lower part of the core tube in a sleeving mode; a drill stem screw pitch regulating device is arranged outside the core tube between the lower holder and the upper holder. According to the integrated clamping and mounting-dismounting drill stem device, the sleeve and the core tube are in threaded connection, the screw pitch of the threads is same as that of threads of the drill stem, and the drill stem is enabled to relatively move by displacement of one screw pitch in an axial direction of the drill stem every time the drill stem rotates by one circle in the drill stem mounting and dismounting processes, so that the drill stem threads are enabled to be not damaged in the mounting and dismounting processes; the drills tem screw pitch regulating device between the lower holder and the upper holder is utilized, so that the quantity of workers and labor intensity of the workers are reduced, and mechanical control automation is realized.