We　present　a　passively　Q-switched　Yb:KGW　laser　based　on　a　transmission-type　saturable　absorber　of　topological　insulator:　Bi2Se3.　The　saturable　absorber　is　prepared　on　a　0.17-mm　glass　substrate　and　can　translate　intra-cavity　for　best　performance　nearly　without　influence　on　the　laser　mode.　At　a　maximum　pump　power　of　13.7　W,　the　central　wavelength,　pulse　duration,　repetition　rate,　and　pulse　energy　of　Q-switched　pulse　are　1043　nm,　1.5　mu　s,　175.4　kHz,　6.39　mu　J,　respectively.　The　maximum　output　power　is　1.12　W.　To　our　knowledge,　this　is　the　highest　average　output　power　from　passively　Q-switched　lasers　with　topological　insulator　saturable　absorbers.