Manhole opening structure of underground rainwater recycling pool

The utility model discloses a manhole opening structure of an underground rainwater recycling pool, which belongs to the technical field of rainwater recycling pool maintenance equipment and comprises a mounting sleeve, the mounting sleeve is pre-buried at the position of an opening above a manhole channel, and a limiting ring is arranged on the inner side face of the mounting sleeve. An annular sealing ring is arranged in the middle of the upper surface of the limiting ring, mounting threaded holes are formed in the upper surface, on the periphery of the sealing ring, of the limiting ring at equal intervals in a surrounding mode, a top cover is mounted above the limiting ring, a monitoring assembly is arranged on the top cover, and a protective cover is further arranged above the top cover. The manhole opening structure is mainly used for solving the problem of monitoring the safety of the internal environment of a manhole and the problem that a top cover is easy to rust and get stuck after being used for a