Tree supporting device for forestry planting

The utility model provides a forestry planting tree supporting device which comprises a first clamping ring and a second clamping ring, the surface of the first clamping ring and the surface of the second clamping ring are each provided with two mounting blocks, first sliding grooves are formed in the mounting blocks, first sliding blocks are slidably connected into the first sliding grooves, and the second sliding blocks are slidably connected into the first sliding grooves. A connecting rod is rotationally connected to the first sliding block, a supporting assembly is fixedly connected to the end, away from the first sliding block, of the connecting rod, and an auxiliary fixing assembly is fixedly connected to the supporting assembly; the tree supporting device is fast and convenient to install, the supporting frame can be inserted into the ground and is more stable than the mode that the supporting frame is supported on the ground purely, the mode that the supporting frame is inserted into the ground is ve