Sampling device based on marine environment quality monitoring

The invention provides a sampling device based on marine environment quality monitoring. The sampling device based on marine environment quality monitoring comprises a barrel body, an electromagnetic valve and the like, the interior of the barrel body is hollow; two electromagnetic valves are respectively arranged at the middle part and the lower part of the outer ring surface of the barrel body; and the electromagnetic valve is detachably connected with a filter screen. Water flow formed through the first air outlet can push aquatic plants in the surrounding area of the barrel body, so that the aquatic plants are far away from the barrel body, the influence of the aquatic plants on downward movement of the barrel body is avoided, meanwhile, water flow formed through the second air outlet can expel fishes and shrimps around the barrel body, and the influence on the barrel during lifting is avoided; and meanwhile, water flow formed by the third air outlet can wash a filter screen on the electromagnetic valve,