The pollution of natural wetland has been developed for many years, and the ditch water has also been enriched by nitrogen and phosphorus, largely attributing to the farmland runoff within the irrigation area. The approach of ecological interception is considered as a kind of agricultural ecological compensation, which has a remarkably important role in controlling the non-point source pollution in agriculture. This study focused on the engineering and technology of the ditch system with regards to ecological interception, and introduced the type of water-related engineering in the different levels of drainage.