The invention discloses a banknote bundle pre-wrapping method, which belongs to the technical field of financial equipment, and comprises the following steps of: step A, the number of banknote bundlesin a banknote bundle stack to be pre-wrapped is obtained, if the number is in the range of 1-5, the step B is executed, and if the number is not in the range of 1-5, the step C is executed; step B: step B1, rotary film releasing is conducted by a film roll feeding motor, and when it is detected that the moving distance is M1, the film roll feeding motor stops rotating; step B2, the banknote bundle stack is pushed to a pre-wrapping station; step B3, the banknotes are pressed by a banknote pressing assembly; step B4, a sealing and cutting assembly acts to complete pre-wrapping of the banknotesand re-bonding of the pre-wrapping film; step C, the film roll feeding motor rotates reversely to release the film; step C2, the banknote bundle stack is pushed to the pre-wrapping station; step C3, the banknotes are pressed by the banknote pressing assembly; step C4, the sealing and cutting assembly acts to complete pre-wrapping of the banknotes and re-bonding of the pre-wrapping film; step D, all components are restored to the original positions, and the steps A-C are repeated. According to the invention, different control programs are adopted to pre-bind any banknote bundle according to different numbers of banknotes.