The invention discloses a weighing and discharging device. The weighing and discharging device comprises a stepping motor, a scale base and a shifting fork of a strip structure, wherein the stepping motor is provided with an optoelectronic switch and a chopper disk and is connected with the shifting fork through an elastic coupling. A scale adjusting seat is mounted at the bottom of the scale base, a bottom plate is arranged at the top of the scale adjusting seat horizontally and is positioned under the shifting fork, and a plurality of parallel V-shaped vertical plates are arranged on the bottom plate perpendicularly and equidistantly sequentially. The shifting fork is provided with a discharging cavity, a shifting block group is arranged on each of two sides of the discharging cavity and consists of a plurality of shifting blocks arranged equidistantly transversely, the shifting blocks in the two shifting block groups are in one-to-one correspondence, a lowest point of every shifting block is lower than that of a V groove of every V-shaped vertical plate, and two corresponding shifting blocks are arranged between every two adjacent V-shaped vertical plates. The weighing and discharging device is more precise in positioning, high in coordination precision among the components, simple in discharging structure, compact in structure and small in size.