Based　on　its　improved　details,　12　full-sized　specimens　of　a　new　type　of　the　double-ball　anchorage　for　prestressing　strands　were　tested　to　investigate　its　behaviors　related　to　sustained　loading,　repeated　cyclic　loading　and　fatigue,　respectively.　The　deformation　of　the　anchorage　due　to　sustained　loading　and　the　influence　of　stress　levels　on　its　behavior　were　first　studied　and　then,　based　on　the　test　results,　the　formula　for　evaluating　such　a　deformation　was　proposed.　According　to　the　test,　the　deformation　of　the　anchorage　resulted　from　the　24-hour　sustained　loading　was　relatively　small　and　it　did　not　lower　its　load-carrying　capacity.　The　repeated　cyclic　loading　tests　show　that,　with　increasing　numbers　of　the　loading　cycles,　the　load-deformation　relationship　of　the　specimens　became　almost　linearly-elastic　in　each　loading　cycle;　after　50　cycles,　the　static　behavior　of　the　anchorage　was　significantly　changed　while　the　maximum　capacity　and　ultimate　deformation　ability　were　not　decreased.　The　test　results　also　show　that　the　double-ball　anchorage　meets　the　requirements　for　both　the　repeated　cyclic　loading　test　and　the　fatigue　test　specified　in　the　code.