The utility model discloses an automatic regulation device for a currency binder. The automatic regulation device is fixed below an upper adhesive plate of the currency binder and has a sliding freedom relative to a lower adhesive plate. The automatic regulation device is characterized by structurally comprising adjustable limit baffles and linear drive mechanisms connected to the adjustable limit baffles; the adjustable limit baffles include a long end limit baffle and a wide side limit baffle for a currency bundle; the long end limit baffle and the wide side limit baffle are separately connected with an output shaft of a regulating motor through the linear drive mechanisms. The automatic regulation device has the advantages that the position of currency placed on the lower adhesive plate is adjusted through length-wise and width-wise limit regulation devices to reasonably bind the currency, the structure is simple, operation is convenient, applicable range of the currency binder is greatly widened, and binding quality is high.