Building vertical greening system

The invention relates to a building vertical greening system. The building vertical greening system comprises a mounting seat arranged on a building wall and a planting pot arranged on the mounting seat, a spherical hinge groove is formed in the mounting seat, a hinge ball spherically hinged to the interior of the spherical hinge groove is arranged at the lower end of the planting pot, an abutting part used for positioning the planting pot is arranged on the mounting seat, a cavity is formed in the mounting seat, a driving assembly used for driving the hinge ball to horizontally and circumferentially rotate in the spherical hinge groove is arranged in the cavity, the driving assembly comprises driving rods vertically and rotatably connected to the bottom face of the cavity and a power piece used for driving all the driving rods to rotate together, the power piece can drive the driving rods to rotate at intervals, the lower end of the spherical hinge groove communicates with the cavity, and a transmission stru