Bill recovery mechanism and bill all-in-one machine

The invention relates to the technical field of bill processing equipment, and provides a bill recycling mechanism and a bill all-in-one machine, the bill recycling mechanism comprises a rack, paper feeding roller sets and a recycling box, the rack is provided with paper feeding channels, and one paper feeding channel is correspondingly provided with two paper feeding roller sets; the recycling box is arranged on the paper outlet side of the paper feeding channel. The paper feeding roller set comprises a driving shaft and a driven shaft, a first roller and a second roller on the driving shaft and the driven shaft are arranged in a staggered mode, the diameter of the first roller is larger than that of the second roller, the first roller on the driving shaft is in rolling contact with the first roller on the driven shaft, and the second roller on the driving shaft is in rolling contact with the second roller on the driven shaft. By means of the diameter difference between the first roller and the second roller