A paper money transporting passage device disposed between an upper machine mechanism or discriminating and distributing paper money and a lower machine mechanism for storing paper money, wherein the paper money transporting passage device is configured to divert, transport and separate paper money and comprises: a bracket configured to install the paper money transporting passage, a pair of transmission belts (0211,0212) wound around driving shafts (0213,0214) and configured to delivery paper money, a first passage plate disposed on the bracket; a second passage plate installed on the bracket and forming a first paper money transporting path with the first passage plate; a third passage plate installed on the bracket, arranged side by side with the second passage plate and forming a second paper money transporting path with the first passage plate, wherein a paper money inlet/outlet of the first paper money transporting path is formed between the third passage plate and the second passage plate; and a diverting mechanism provided between the third passage plate and the second passage plate and configured to selectively open or close the paper money inlet/outlet of the first paper money transporting path, characterized in that the diverting mechanism comprises a diverting shaft, a plurality of diverting pieces mounted side by side on the diverting shaft with a distance there between, and a solenoid valve for controlling the switching of the diverting pieces between a first position and a second position, and each diverting piece is of a "less-than sign" shape and comprises two ends (02321,02322) and an inner concave surface between the two ends, and a rib is provided on the inner concave surface and has an approximately same curvature as the inner concave surface, the rib projects outward a staggered interface between a diverting piece that the rib is provided on and teeth-shaped bodies on a passage plate that is staggered with the diverting piece when the diverting pieces are located at the first position a bracket configured to install the paper money transporting passage, a pair of transmission belts (0211,0212) wound around driving shafts (0213,0214) and configured to delivery paper money, a first passage plate disposed on the bracket; a second passage plate installed on the bracket and forming a first paper money transporting path with the first passage plate; a third passage plate installed on the bracket, arranged side by side with the second passage plate and forming a second paper money transporting path with the first passage plate, wherein a paper money inlet/outlet of the first paper money transporting path is formed between the third passage plate and the second passage plate; and a diverting mechanism provided between the third passage plate and the second passage plate and configured to selectively open or close the paper money inlet/outlet of the first paper money transporting path, characterized in that the diverting mechanism comprises a diverting shaft, a plurality of diverting pieces mounted side by side on the diverting shaft with a distance there between, and a solenoid valve for controlling the switching of the diverting pieces between a first position and a second position, and each diverting piece is of a "less-than sign" shape and comprises two ends (02321,02322) and an inner concave surface between the two ends, and a rib is provided on the inner concave surface and has an approximately same curvature as the inner concave surface, the rib projects outward a staggered interface between a diverting piece that the rib is provided on and teeth-shaped bodies on a passage plate that is staggered with the diverting piece when the diverting pieces are located at the first position