Automatic flour metering device

The utility model relates to the technical field of flour production, and discloses an automatic flour metering device which comprises a machine frame with a conveying cavity, a weighing machine, a weighing conveying mechanism, a discharging conveying mechanism and a waste discharging mechanism, and the weighing machine, the weighing conveying mechanism, the discharging conveying mechanism and the waste discharging mechanism are arranged on the machine frame. A waste discharge port allowing flour to fall into the collecting box is formed in the rack, a bearing plate capable of sliding to ascend and descend is arranged in the collecting box, and the bearing plate is connected with an adjusting component for driving the bearing plate to ascend and descend; by additionally arranging the bearing plate in the collecting box and arranging the adjusting component, unqualified flour bags in the collecting box can be lifted to the top of the collecting box, the unqualified flour bags can be conveniently taken out of t