In　this　paper,　according　to　the　previous　studies　and　water　body＇s　hydrodynamic　and　quality　features　in　the　tidal　river　network　region,　one-dimensional　hydrodynamic　and　water　quality　model　is　established　and　validated.　The　results　show　that　the　calculated　value　of　hydrodynamic　model　can　better　match　the　measured　and　reflect　the　tidal　fluctuation　trends　accurately,　and　water　quality　model　can　reflect　the　changes　of　contaminants　reverberating　within　the　river　network　in　the　impact　of　fluctuation　in　tide.　This　study　with　a　certain　directive　significance　provides　a　theoretical　foundation　to　solve　the　problems　of　water　environment　of　Fuzhou　City.　©2009　IEEE.