The invention discloses a rotary unloading type tramcar continuous track transport system used for bulk material transportation. The rotary unloading type tramcar continuous track transport system used for bulk material transportation comprises rotary unloading type tramcars, a drive chain wheel, a traction chain set, an unloading chain wheel, a broken chain grasping protection device, a direction changing chain wheel, an upward track, a downward track, a track supporting frame and a loading guiding device. The rotary unloading type tramcars are connected in series through cross structures and the traction chain set to form a rotary unloading type tramcar set. The series-connection tramcar set is connected in an end-to-end manner through the drive chain wheel, the track supporting frame, the direction changing chain wheel and the loading guiding device to form a closed loop system. When the rotary unloading type tramcar set works and runs (except unloading and overturning), center lines of rotating shafts of the tramcars are in a horizontal state all the time, the gravity centers of the tramcars are under the center lines of the rotating shafts all the time, and the rotary unloading type tramcar set automatically carries out continuous loading under limitation of the guiding device when passing through the loading system; and when the rotary unloading type tramcar set carries out unloading at the unloading point, each rotary unloading tramcar carriage rotates around the corresponding rotating shaft by 360 degrees under the limitation of a tramcar damping device, and in the rotation process, bulk materials are automatically unloaded under the gravity action.