The invention discloses an accelerated converging device for cigarette box conveying. The accelerated converging device comprises a main conveying track and a branch conveying track. An accelerated converging structure is arranged between the outlet of the branch conveying track and the main conveying track. The accelerated conveying structure comprises a driving support, driving units and a driving motor. Each driving unit is composed of a driving wheel, a tail wheel and a driving belt which is arranged on the driving wheel and the tail wheel in a sleeving mode. The multiple driving units are arranged in the width direction of the branch conveying track. A posture adjusting structure is arranged at the position, in front of the accelerated converging structure, of the main conveying track and arranged on the side, close to the branch conveying track, of the main conveying track. The posture adjusting structure comprises an adjusting wheel set formed by arranging multiple adjusting wheels in an arc shape. The arc top of the arc where the adjusting wheel set is located is protruded into the conveying face of the main conveying track from outside to inside from the position above the main conveying track. The accelerated converging device is wide in using range, simple in structure, high in reliability, multifunctional and high in working efficiency, and waiting time of the main conveying track is shortened.