Greening structure for greening top surface of building

The utility model relates to the technical field of building top surface greening, in particular to a greening structure for building top surface greening, and adopts the technical scheme that the greening structure comprises a water accumulation tank, a filtering device capable of filtering rainwater is arranged in the water accumulation tank, and a mounting device capable of mounting the filtering device is arranged on the outer wall of the water accumulation tank; the rainwater collecting device has the advantages that the filtering device capable of filtering rainwater is arranged in the water collecting tank, the installing device capable of installing the filtering device is arranged on the outer wall of the water collecting tank, impurities in the rainwater can be filtered out through the filtering plate when the rainwater is collected, and meanwhile the rainwater collecting device can be used for collecting rainwater. And the filtering plate is taken out of the water accumulating tank by rotating the