Big tree planting supporting device

The utility model discloses a big tree planting support device in the technical field of tree planting support. The device comprises three groups of fixing sleeves, connecting blocks are welded to themiddles of the two side walls of the three sets of fixing sleeves. The two groups of connecting blocks are symmetrically arranged relative to the center line of the fixing sleeve; an adjusting bolt nut I is transversely mounted between the two groups of connecting blocks; the adjusting bolt nut I is in threaded connection with the two groups of connecting blocks; a U-shaped fixing block is weldedto the middle of the outer wall of the fixing sleeve. According to the utility model, the movable protective cover is arranged on the side wall of the support rod; a sliding groove and a sliding rodare matched; the protective cover is arranged outside the conical drill bit; according to the supporting device, the clamping rings are arranged on the side walls of the supporting rods and can be opened and closed, so that the