The utility model provides an automatic dough leavening conveying bin. The dough leavening device comprises a dough leavening bin, a conveying mechanism is arranged in the dough leavening bin, the conveying mechanism comprises a rack, a transmission dough conveying belt is arranged on the rack, the middle position of the dough conveying belt is lower than the edges of the two sides of the dough conveying belt, and a flow guide piece used for discharging dough is arranged at the discharging end of the rack. The dough leavening device is used for leavening dough at a time, the dough can be conveyed along with leavening of the dough, work efficiency is improved, and line production of a bread conveying line is facilitated.