A concrete chute tube structure system comprises a supporting frame, a fixed chute tube and a movable chute tube. The supporting frame is erected on a steel reinforcement framework at the position ofto-be-poured concrete, and the top face of the supporting frame is an inclined face. The fixed chute tube is divided into an upper chute tube section and a lower chute tube section; A buffer groove isformed between the upper chute tube section and the lower chute tube section; The buffer groove comprises a box-shaped body defined by a bottom surface, a top surface and a side surface; A feeding port connected with the upper chute tube section is formed in the rear side face of the buffer groove, and a discharging port connected with the lower chute tube section is formed in the front side faceof the buffer groove. The left and right side surfaces of the buffer groove are respectively provided with shunting ports; Baffles are detachably connected to the positions, corresponding to the discharging opening and the flow dividing opening, in the buffer groove. The concrete chute tube structure system further comprises a turn-back chute tube section; And the upper end of the turn-back chutetube section is correspondingly connected with the diversion port in the buffer groove, and the lower end of the turn-back chute tube section is supported at the position of to-be-poured concrete. The technical problem that continuous pouring of concrete is difficult to ensure when a construction site is narrow and small is solved.