position limiting plate 131 and to transmit the data to the data processing module 250 and to store the data in the storage module 240 3 the central control module 210 controls the data processing module 250 to invoke the conversion formulas stored in the storage module 240 for adjusting the width and for converting the amount of movement of the elements according to the current banknote image information and the current initial position of the position limiting plate 131 to perform data processing so as to generate a position parameter for adjusting the position limiting plate 131 or the locating tooth 1322 and a drive parameter for driving the position limiting motor 133 4 the central control module 210 controls the execution module to generate servo signal for the execution elements according to the drive parameter from the data processing module 250 so as to drive the position limiting motor 133 to rotate and further adjust the upward or downward movement of the position limiting plate 131 taking the banknotes having a width of 85 mm as an example the controller 200 controls the position limiting motor 133 to rotate so as to drive the position limiting plate 131 to move such as to be 88 mm apart from.