NOVELTY - Sewage purification system of constructed wetland coupling sequencing batch reactor (SBR) denitrification and dephosphorizing integration, comprises a SBR reaction pool and a constructed wetland, where the bottom part of the SBR reaction pool is provided with a perforating aerated pipe. One side of the pool wall is provided with a mud discharging pipe and a water inlet pipe while the other side is equipped with a muddy water overflow pipe and a water discharging pipe, where the muddy water overflow pipe and the water discharging pipe are connected to a water distribution groove.    USE - Used as a sewage purification system of constructed wetland coupling sequencing batch reactor denitrification and dephosphorizing integration.    ADVANTAGE - The sewage purification system: combines SBR with the constructed wetland; exhibits improved nitrogen and phosphorus removal capability and hydraulic load; has stable performance; is simple and convenient to maintain and manage; and is not influenced by the season, thus providing highly efficient operation.    DETAILED DESCRIPTION - Sewage purification system of constructed wetland coupling sequencing batch reactor (SBR) denitrification and dephosphorizing integration, comprises a SBR reaction pool and a constructed wetland, where the bottom part of the SBR reaction pool is provided with a perforating aerated pipe. One side of the pool wall of the SBR reaction pool is provided with a mud discharging pipe and a water inlet pipe while the other side is equipped with a muddy water overflow pipe and a water discharging pipe, where the muddy water overflow pipe and the water discharging pipe are connected to a water distribution groove of the constructed wetland, and 90% height of a bed body of the constructed wetland is installed under the ground. The bed body includes the water distribution groove, a filling layer, a soil layer and a water collecting groove. The water distribution groove is installed at the front end of the bed body and the water collecting groove is installed at the back end of the bed body. The filing layer is arranged between the water distribution groove and the water collecting groove. The upper part of the filling layer is connected to the water distributing groove and the bottom part of the filling layer is connected to the water collecting groove. The filling layer is formed from mixing hematite, magnetite and limestone with the particle size of 1-4 cm. The soil layer is garden soil and mounted on the upper side of the filling layer and is planted with emergent aquatic plants.