The invention discloses a seedling pushing rod head structure device for an overflowing farmland rice transplanter and relates to the field of farmland planting and production equipment. The end side of a seedling pushing rod of the rice transplanter is of a pushing rod head structure, and a rice transplanting pressure plate structure is assembled in the seedling pushing rod; the rice transplanting pressure plate structure comprises pressure plate side connecting plates, a bump press cake, a pair of fixed connecting plates and an overflowing inclined plate; the bump press cake is fixed between the pair of the pressure plate side connecting plates; the overflowing inclined plate is fixedly connected to the upper side of the bump press cake; and the pair of fixed connecting plates is fixedly connected to two sides of the overflowing inclined plate. By assembling the position-adjustable rice transplanting pressure plate structure in the pushing rod head of the seedling pushing rod of the rice transplanter, effective rice transplanting operations are performed on farmlands of silt seams different in depth; by arranging the overflowing inclined plate on the rice transplanting pressure plate, the rice transplanting resistance before rice transplanting is reduced; when the pushing rod head rises, the water pressure of the seedling is reduced, so that silt coverage at the seedling is facilitated, and the floating rate of the rice transplanting seedlings is reduced.