Industrial aquaculture zero-emission resource recycling and purifying system and purifying process thereof

The invention provides an industrial aquaculture zero-emission resource recycling and purifying system and a purifying process thereof. The purifying system comprises an aquaculture pond, a sediment adjusting pond, a microfiltration device, a vacuum suction filtration device, a three-stage biological purifying device, an ozone ultraviolet reactor and a clean water pond. A water inlet of the precipitation regulating tank is connected with a sludge outlet of the culture pond; a water inlet of the microfiltration device is connected with a water outlet of the precipitation regulating tank; a water inlet of the vacuum suction filtration device is respectively connected with a concentrated solution outlet of the microfiltration device and a precipitation solution outlet of the precipitation regulation tank; a water inlet of the third-stage biological purification device is connected with water outlets of the microfiltration device and the vacuum filtration device; the ozone ultraviolet reactor is connected to a wa