The invention discloses a garden digging tree planting robot, which comprises a horizontal plate, an arc-shaped plate at the side end of the horizontal plate, a vertical plate at the lower end of the arc-shaped plate, and a T-shaped groove in the horizontal plate, the arc-shaped plate, and the vertical plate. There is a T-shaped slider in the T-shaped slot, a slide plate on the T-shaped slide block, a fixing belt on the sliding plate, a through hole on the fixing belt, the fixing belt is fixed by bolts, a compartment on the top of the horizontal plate, and a partition in the compartment. There is a horizontal twisted cage at the lower end of the horizontal plate. There is a rotating shaft A inside the horizontal twisted cage. There is a spiral blade A on the rotating shaft A. The rotating shaft A is driven by a motor A. There is a horizontal twisted cage feeding port on the horizontal twisted cage. There is a sleeve on the fixed rod, and a vertical rod is inserted into the sleeve. During the whole process, it is only necessary to fix the saplings on the skateboard. There is no need to manually support and bury the saplings, which saves time and effort, and ensures stability. Even better, one person can dig holes and plant trees, which saves manpower. At the same time, there is no need to manually use a shovel to backfill the soil, which is highly efficient and very convenient.