Micro-nano aeration machines, also known as micro-nano oxygenation machines, consist of a pump, micro-nano bubble generator, pressure gauge, aeration head, and some pipe fittings. They are a set of equipment specifically developed for river treatment and dissolved oxygen management. The principle involves using nanotechnology to initially compress a large amount of air into a large number of non-pressurized microbubbles with a diameter of 0.25mm. Then, using a release system, these 0.25mm diameter non-pressurized microbubbles are highly dispersed in a semi-vacuum condition through gas and liquid phases, producing micro-nano bubbles with a diameter less than 3μ and nano bubbles, collectively referred to as micro-nano bubbles. These bubbles are released into the water body to quickly enrich oxygen, achieving the effect of increasing dissolved oxygen in the water.