Wetland is one of the most important environments for human beings, and it is also an ecosystem rich in biodiversity and high productivity. It not only has rich resources, but also has a huge environmental regulation function and ecological benefits. All kinds of wetlands play an important role in providing water resources, regulating climate, conserving water resources, homogenizing flood, promoting siltation and land building, degrading pollutants, protecting biodiversity and providing production and living resources for human beings.