The invention relates to an air suction type minisize potato precision planter which comprises a stander, a seed box, a land wheel, a sowing boot, a ridging disc, an air blower, a chemical box, a closed air suction cavity, an air suction seed feeding disc, a sowing depth limiting mechanism and a seed taking and falling unit, wherein the air blower is fixedly connected with the stander, the air blower is communicated with the closed air suction cavity through an air suction pipeline, and the side surface of the closed air suction cavity is provided with an air suction opening; the seed box is fixedly connected with the stander, and the lower end of the seed box is provided with a seed discharge opening; the air suction seed feeding disc is arranged on the side surface of the closed air suction cavity, the air suction seed feeding disc is provided with a seed suction round hole, and the seed suction round hole is positioned at an air suction opening position arranged on the side surface of the closed air suction cavity; the seed taking and falling unit is arranged laterally below the air suction seed feeding disc and is a cylinder, and a plurality of seed taking grooves are uniformly distributed in the cylindrical surface of the cylinder; and the seed discharge opening of the seed box is positioned just above the seed suction round hole positioned in the uppermost end of the air suction seed feeding disc.