A paper money discharging plate posture adjustment mechanism of a circulating paper money distribution opening can overcome the defects that the posture of a paper money discharging plate of the circulating paper money distribution opening cannot be adjusted for different use states, and then the circulating paper money distribution opening is prone to being stuck. The paper money discharging plate posture adjustment mechanism of the circulating paper money distribution opening includes a paper money discharging plate hanging hook, a rotation shaft, a torsion spring, a torsion limiter, and a limiting device for limiting the rotation angle of the paper money discharging plate hanging hook; the paper money discharging hanging hooker sleeves the rotation shaft and is rotatably connected to the rotation shaft; two ends of the torsion spring are fixedly connected to the rotation shaft and the paper money discharging hanging hook respectively; the rotation shaft is connected to a synchronizing wheel through the torsion limiter; the paper money discharging plate is provided with a hanging hook connection rod corresponding to the paper money hanging hook; and the synchronizing wheel, the paper money discharging plate and a posture adjustment mechanism form a structure of a hook connection between the paper money discharging plate hook and the hanging hook connection rod of the paper money discharging plate while the synchronizing wheel drives the paper money discharging plate hanging hook to rotate to a limiting position set by the limiting device. The paper money discharging plate posture adjustment mechanism achieves a good stacking effect and a good distribution effect, and can be used for the circulating paper money distribution opening.