Upright post greening system

The invention relates to an upright post greening system. The upright post greening system comprises a hollow supporting post; a plurality of planting barrels are arranged along the axial direction of the hollow supporting post at intervals; a plurality of rows of planting holes are formed at the periphery of each planting barrel; the two adjacent rows of planting holes are staggered; a water inlet pipe is arranged in the axle center of the hollow supporting post; a drip irrigation pipe communicated with the water inlet pipe is arranged at the mouth position of each planting barrel; and at least one dripping head communicated with the drip irrigation pipe is arranged on the outer wall of the drip irrigation pipe. The plurality of planting barrels are arranged along the axial direction of the supporting post and a plurality of rows of planting holes are formed at the periphery of each planting barrel, so that greening plants can be planted in the planting holes, greening is formed from top to bottom and in the