A day lily seedling planting machine comprises a bottom plate. A seedling transporting and conveying mechanism, a digging and soil expanding mechanism, a seedling falling and discharging mechanism anda ridging and soil covering mechanism are arranged on the bottom plate, four first fixed columns are rectangularly arrayed and vertically fixed at the left end of the upper side of the bottom plate,a fixed frame is fixed at the upper side ends of the four first fixed columns, two day lily seedling baskets are fixed at the upper right end of the bottom plate, and a seat is arranged between the two day lily seedling baskets. According to the seedling planting machine, four-station hole digging, day lily seedling falling, day lily seedling branch conveying adjusting and day lily ridging can beachieved once, the machine is simple and convenient to operate, requirements for users are low, a lot of sowing time of farmers can be saved, conditions are provided for near working and family incomeimprovement of the framers, day lily industry is developed, development of industries such as processing, transporting, dining, energy, packaging and marketing can be facilitated, and the seedling planting machine has great significances for rural labor force saving, rural economic development promoting, farmer income increase and rural stability maintenance.