River course ecological treatment system

A river course ecological treatment system for use in a river, comprising:

• a plurality of plastic retaining dams disposed in the river that receive and divide the river course into sequential retaining regions arranged in a direction from upstream to downstream;
• a plurality of ecological biological water purification systems disposed in the river in the sequential retaining regions and each ecological biological water purification system of the plurality of ecological biological water purification systems being located between any two adjacent plastic retaining dams of the plurality of plastic retaining dams to purify water within the sequential retaining regions and discharge purified water;
• and
• at least one damp land ecological water purification system that is disposed beside the river and that comprises:
• a rainwater channel disposed along the river;
• aquatic plants disposed in the rainwater channel that are effective to purify water flowing within the rainwater channel;
• and
• draining vents provided in the rainwater channel that discharge purified water into the river course.