Metering device

The utility model discloses a metering device. The metering device comprises a stock bin, a conveyor, a control box, a coarse metering hopper and a fine metering hopper. Wherein a feeding hole and a discharging hole are formed in the conveyor; the feeding hole is connected with the stock bin; the discharge hole is connected with the fine measuring hopper; a regulating valve I is arranged between the discharge hole and the fine measuring hopper; a discharge hole of the fine metering hopper is connected with the coarse metering hopper; the fine measuring hopper is embedded in the coarse measuring hopper; an adjusting valve II is arranged at the lower end of the fine measuring hopper; a weighing sensor II is arranged on the fine measuring hopper; an adjusting valve III is arranged at the lower end of the coarse metering hopper, a weighing sensor I is arranged on the coarse metering hopper, the measuring range of the weighing sensor I is larger than that of the weighing sensor II, a frequency converter and a cont