A banknote dispenser, comprising: a housing, comprising an upper cover and a base case, one end of the upper cover being movably connected to one end of the base case via a rotating shaft, and a space for accommodating other components and banknotes being formed in the case that the upper cover is closed on the base case, and the housing being provided with a banknote outlet for discharging the banknotes; a banknote separating mechanism located near the banknote outlet, and comprising a banknote picking wheel assembly configured to be placed on a surface of the banknotes, a banknote separating wheel assembly and a reverse wheel which are configured to be placed at an end of the banknotes and to separate a stack of banknotes piece by piece, and a banknote separating base plate configured to install required components, wherein the banknote picking wheel assembly comprises a banknote picking wheel having a rubber surface, a banknote picking wheel shaft configured to rotate the banknote picking wheel, and a first one-way bearing configured to assemble the banknote picking wheel and the banknote picking wheel shaft, and the banknote separating wheel assembly comprises a banknote separating rubber wheel in an interference fit with the reverse wheel, a banknote separating wheel shaft configured to rotate the banknote separating rubber wheel, and a second one-way bearing configured to assemble the banknote separating rubber wheel and the banknote separating wheel shaft; a banknote pressing mechanism, comprising a banknote pressing board placed in the base case and configured to stack up the stack of banknotes, a guide shaft of the banknote pressing board, and a banknote pressing spring configured to enable the banknote pressing board to always press against the banknote picking wheel assembly of the banknote separating mechanism; and a limiting block, arranged on one end where the stack of banknotes is separated out, at least a guide rib being provided on a surface of the limiting block in a banknote stacking direction, and a height of the guide rib being decreased progressively in the direction towards the banknote outlet. a housing, comprising an upper cover and a base case, one end of the upper cover being movably connected to one end of the base case via a rotating shaft, and a space for accommodating other components and banknotes being formed in the case that the upper cover is closed on the base case, and the housing being provided with a banknote outlet for discharging the banknotes; a banknote separating mechanism located near the banknote outlet, and comprising a banknote picking wheel assembly configured to be placed on a surface of the banknotes, a banknote separating wheel assembly and a reverse wheel which are configured to be placed at an end of the banknotes and to separate a stack of banknotes piece by piece, and a banknote separating base plate configured to install required components, wherein the banknote picking wheel assembly comprises a banknote picking wheel having a rubber surface, a banknote picking wheel shaft configured to rotate the banknote picking wheel, and a first one-way bearing configured to assemble the banknote picking wheel and the banknote picking wheel shaft, and the banknote separating wheel assembly comprises a banknote separating rubber wheel in an interference fit with the reverse wheel, a banknote separating wheel shaft configured to rotate the banknote separating rubber wheel, and a second one-way bearing configured to assemble the banknote separating rubber wheel and the banknote separating wheel shaft; a banknote pressing mechanism, comprising a banknote pressing board placed in the base case and configured to stack up the stack of banknotes, a guide shaft of the banknote pressing board, and a banknote pressing spring configured to enable the banknote pressing board to always press against the banknote picking wheel assembly of the banknote separating mechanism; and a limiting block, arranged on one end where the stack of banknotes is separated out, at least a guide rib being provided on a surface of the limiting block in a banknote stacking direction, and a height of the guide rib being decreased progressively in the direction towards the banknote outlet.