Based　on　analysis　of　distribution　patterns　of　As,　Cd,　Cr,　Cu,　Hg,　Ni,　Pb　and　Zn　in　surface　sediments　of　the　Tongjiqiao　Reservoir　that　is　a　typical　town　reservoir,　pollution　degree　and　ecological　risks　were　assessed　by　single　factor　index　method,　geoaccumulation　index,　potential　ecological　risk　method　and　principal　component　analysis.　The　results　showed　that:　8　kinds　of　heavy　metals　had　a　certain　degree　of　pollution　in　surface　sediments　and　accumulated　mainly　in　pre　dam　and　southwest　area.　Pollution　of　Hg　and　Cd　is　in　the　broader,　deeper　level.　Because　of　influence　of　Hg　and　Cd,　there　was　a　moderate　ecological　risk　of　heavy　metals　in　the　surface　sediments.　With　reference　to　management　of　reservoirs,　it　is　of　great　significance　to　ensure　the　safety　and　management　of　water　quality　in　the　small　sized　reservoirs　by　putting　prevention　of　heavy　metals　pollution　in　an　important　position.　©　2018　by　Journal　of　Lake　Sciences.