Line-spacing-adjustable power type small corn double-row seeder

The utility model relates to a row spacing adjustable power type small corn double-row seeder which comprises a supporting plate, one side of an adjusting block is fixedly connected with a placing box, the placing box is in sliding connection with the supporting plate, the interior of the placing box is rotatably connected with a transmission shaft, the outer side of the transmission shaft is fixedly connected with a rotating disc, and the rotating disc is fixedly connected with the adjusting block. Storage grooves are formed in the outer side of the rotating disc at equal intervals, a connecting pipe is fixedly connected to the bottom of the containing box, a fixing pipe is arranged at the position, located on one side of the connecting pipe, of the bottom of the containing box, a spray head is arranged at the bottom of the fixing pipe, a liquid storage box is fixedly connected to the top of the supporting plate, and a water pump is placed at the inner bottom of the liquid storage box. A water inlet of the w