A paper money stacking apparatus (06) and a paper money processing device comprising the paper money stacking apparatus (06). The paper money stacking apparatus (06) comprises: an input mechanism (1), comprising an upper conveying belt (11) and an upper conveying rotation shaft (13) driving the upper conveying belt (11); a stacking platform mechanism (2), comprising a platform (21) configured to carry paper money, the platform (21) being controlled by a lifting mechanism to selectively move up and down; and a compressing and conveying mechanism (3), located above the stacking platform mechanism (2), configured to compress the paper money and convey the paper money stacked on the platform (21) forwards, and provided with a pressing rod (31), wherein one end of the pressing rod is rotationally arranged on the upper conveying rotation shaft (13), the other end of the pressing rod (31) is a free end and freely falls towards the platform (21), a first concave type wheel (311) and a second concave type wheel (312) are arranged on the rotary fixed end and free end of the pressing rod (31) respectively, and first O-shaped belts (316) are arranged on the first concave type wheel (311) and the second concave type wheel (312), the first concave type wheel (311) synchronously rotating with the upper conveying rotation shaft (13). Compared with an ordinary manipulator type clamping mechanism, the paper money stacking apparatus (06) is simpler in structure and lower in cost.