Abstract: Due to the better pollutant removal effect and smaller footprint area, the subsurface flow constructed wetland is widely used in the purification of tail water from sewage treatment plants. However, with the operation of subsurface flow constructed wetland, the clogging problem occurs, which seriously affects the pollutant removal effect of the subsurface flow constructed wetland. In this paper, the clogging mechanism, clogging monitoring and evaluation methods of subsurface flow constructed wetland were reviewed. The clogging solution of subsurface flow constructed wetland was put forward from the early design stage and the later operation & maintenance management, so as to provide some reference for solving the clogging, prolonging the service life and maintaining the stable operation of subsurface flow constructed wetland.