The invention discloses a roadbed drainage structure for a municipal administration road. The roadbed drainage structure comprises a high-elevation road segment and a low-elevation road segment. A intercepting drain is formed in the position of a slope toe of the high-elevation road segment, and a seepage-proof composite geomembrane is laid at the bottom of the intercepting drain; a layer of gravel is laid at the position, close to the high-elevation side, of the bottom of the intercepting drain; a baffle is arranged at the position, 30 cm away from the inner wall of the high-elevation side, in the intercepting drain; and a water suction pipe is further arranged in the intercepting drain. The invention further provides a construction method of the roadbed drainage structure. By the adoption of the roadbed drainage structure and the construction method of the roadbed drainage structure, a roadbed perched water problem is solved, meanwhile, the normal procedure of roadbed compaction is not affected, and it is guaranteed that the construction schedule is not affected.