Novel roof flower bed

The novel roof flower bed comprises a roof flower bed main body, drainage ports are formed in the left side and the right side of the roof flower bed main body, drainage filter screens are arranged in the drainage ports, and an irrigation mechanism is arranged in the roof flower bed main body; the irrigation mechanism comprises a water inlet main pipe arranged at the inner bottom of the roof flower pond body, a water inlet branch pipe is arranged in the middle of the water inlet main pipe, a plurality of water inlet filtering openings are formed in the water inlet main pipe and the water inlet branch pipe at equal intervals, and a water injection pipe is arranged on the water inlet main pipe; the roof flower bed body is composed of a roof panel, a mortar leveling layer, a waterproof layer, a fine aggregate concrete protection layer, a steel bar reinforcing layer, concrete, a gravel layer and a geotechnical cloth layer. The drainage port, the drainage filter screen and the gravel layer are used in cooperation,