Seed metering device for potato planting

The utility model discloses a seed metering device for potato planting, and relates to the technical field of potato planting. Partition plates are arranged on the left side and the right side in thebox body, reset switches are fixed to the upper surfaces of the fixing plates, cams are arranged on the upper sides of the reset switches and arranged on output shafts of first motors in a sleeving mode, the reset switches are connected with air cylinders, connecting plates are fixed to piston rods of the air cylinders, and pressing rods are fixed to the lower surfaces of the connecting plates. The lower end of the pressing rod is sleeved with a first guide pipe, elastic blocking pieces are fixed to the left side and the right side of the inner ring wall of the middle side of the first guide pipe, a second guide pipe is arranged on the upper left side of each elastic blocking piece, the left end of each second guide pipe is inserted into the corresponding partition plate, and a supportingplate is arranged on the l