The invention discloses a standing bag box filler. The standing bag box filler comprises a paper separating board conveying device, a paper separating board feeding device, a standing bag overturning device and a belt feeding and arranging device, wherein the paper separating board conveying device comprises a first rack and a first conveying mechanism, the paper separating board feeding device comprises a second rack, a paper separating board absorbing device and a paper separating board pushing device, the standing bag overturning device comprises a third rack, a standing bag overturning conveying mechanism and a bag pushing device, and the belt feeding and arranging device comprises a fourth rack, a sixth driving mechanism, a fourth driving shaft, a fourth driven shaft, a first conveyer belt, a first arranging device, a seventh driving mechanism, a fifth driving shaft, a fifth driven shaft, a second conveyer belt and a second arranging device. According to the structure of the standing bag box filler, due to the fact that standing bags can be packaged automatically and reliably, packaging efficiency is improved, and the labor cost is reduced.