The utility model relates to a three-dimensional greening device with a function baffle. The functional baffle and a retractable part which is used for dragging the functional baffle are installed in a supporting box, and then paved plants are fixed at the front of the supporting box to form a three-dimensional greening unit; three-dimensional greening units are transversely and longitudinally arranged one by one and are fixed on the surface of a building, adjacent three-dimensional greening units are transversely and closely arranged, a dip angle is formed between the vertical direction of each three-dimensional greening unit and the surface of the building, and the dip angles of upper and lower three-dimensional greening units are arranged in a staggered way; and when sunshine is too strong or the color of the plants is not attractive in winter, the function baffle is controlled to be extended and retracted through a controller to enable the function baffle in an upper supporting box to be extended downwards to cover the paved plants at the front of a lower supporting box. The device has the advantages that the plants can be prevented from being invaded by sunshine, the situation that attractiveness is affected because the leaves of plants fall in winter can be avoided, solar energy can be absorbed and utilized, energy can be saved and the device can be used for the top surfaces, slope surfaces and vertical wall surfaces of all types of buildings and inherent flat surfaces, slope surfaces and vertical surfaces in nature.