High-efficiency aeration inner core

The utility model relates to the field of sewage treatment tools, in particular to a high-efficiency aeration inner core which comprises a first-stage rotational flow generating device, a second-stage rotational flow generating device, an inner core cylinder and a core body outer cylinder, the core body outer cylinder is fixedly installed in an aeration cylinder, and the first-stage rotational flow generating device is connected to the lower portion in a cavity of the core body outer cylinder in a clamped mode. The first-stage rotational flow generating device is rotatably mounted at the upper end of the aeration device, the second-stage rotational flow generating device is rotatably mounted at the upper end of the first-stage rotational flow generating device, and the inner core cylinder is fixedly mounted at the upper end of the second-stage rotational flow generating device. According to the high-efficiency aeration inner core, the second-stage rotational flow generating device is designed, so that the inn