The invention relates to a belt paper feeder. The belt paper feeder comprises a, wallboards (1) at two ends and a pair of guiding shafts (3) which are connected on the wallboards (1), wherein the guiding shafts (3) are provided with two baffle adjustment seats (4) which are provided with a front baffle (6) and a side baffle (7), and the wallboard (1) at each end is provided with a screw (2) which is connected with the baffle adjustment seats (4) in an assembling mode. b, a square cross bar (21) is connected between the wallboards (1) at the two ends, the square cross bar (21) is connected with a plurality of pairs of idler wheel support plates (8), and the idler wheel support plates (8) are provided with idler wheels (13) in an assembling mode. c, the wallboards (1) at the two ends are further connected with a belt roller (20) in a matching mode, a delivering belt (19) is connected between the belt roller (20) and the idler wheels (13). d, a gear shaft (15) is connected on the wallboards (1) at the two ends, the gear shaft (15) is connected with a gear (16), a group of guide pulleys (17) are connected on the inner side of each wallboard (1), the guide pulleys (17) and a rack (18) are connected in a matching mode, the rack (18) is meshed with the gear (16) and is connected with a support frame (14), and the support frame (14) is connected with a back-up roll (12). The above technical scheme is adopted, and the belt paper feeder has the advantages of being easy to process, convenient to operate, high in efficiency and the like.