The invention is applicable to the technical field of financial self-service equipment, and discloses an arrangement method and system of banknotes in a cash box, and terminal equipment. The arrangement method comprises: controlling a lifting platform to move upwardly to the top position of the cash box; controlling the lifting platform to move downwardly when it is detected that the lifting platform reaches the top position; controlling a tongue piece to start rotation after a first preset time from the moment that the lifting platform starts downward movement; controlling the tongue piece tostop rotation after a second preset time from the moment that the tongue piece starts rotation; and controlling the lifting platform to stop movement when it is detected that the lifting platform reaches a preset target position. According to the method and system, and the terminal equipment, the problem that the banknotes are not completely separated from a connecting portion on a cash box transmission channel in a banknote arrangement process is effectively solved, the control process is simple, the efficiency is improved, and the power consumption is reduced.