Fish and vegetable symbiotic system

A fish and vegetable symbiotic system comprises: a breeding area comprising a plurality of fish ponds; the balance pond is communicated with a water outlet pipeline of the fish pond, and an ozone machine is communicated with a balance pond pipeline; the overflow pool is adjacent to the balance pool, the overflow pool is lower than the balance pool, and the top of the balance pool is provided with a flow guide part for guiding overflowed water to the overflow pool; the water treatment mechanism is communicated with a pipeline of the balance pool through a water pump, and water treated by the water treatment mechanism flows back and is injected into the fishpond; a water inlet of the planting area is communicated with a water outlet pipeline of the overflow pool through a water pump, a water outlet of the planting area is communicated with a water inlet pipeline of the overflow pool, and a screen filter is arranged between the water outlet of the planting area and the water inlet of the overflow pool. And the o