We　demonstrated　a　high-repetition-rate　Q-switched　fiber　laser　with　topological　insulator　Bi2Se3　absorber.　The　absorber　was　made　into　a　film　structure　by　spin-coating　method　using　few-layer　Bi2Se3　nano-platelets　which　had　regular　shape.　The　uniform　film　had　a　low　saturable　optical　intensity　of　11　MW/cm(2),　which　is　the　lowest　saturable　optical　intensity　in　the　saturable　absorbers　made　by　topological　insulator　till　now.　By　inserting　the　absorber　film　into　an　Erbium-doped　fiber　laser,　a　high-repetition　Q-switched　laser　with　the　repetition　rates　from　459　kHz　to　940　kHz　was　achieved.　The　maximum　output　power　was　22.35　mW　with　the　shortest　pulse　duration　of　1.9　mu　s.　To　the　best　of　our　knowledge,　both　of　the　repetition　rate　and　the　output　power　were　the　highest　values　among　the　Q-switched　fiber　lasers　with　topological　insulator　absorber.　(C)　2014　Optical　Society　of　America