Hydrogen-fueled　Wankel　rotary　engine　(HWRE),　as　a　high　power　density　and　eco-friendly　internal　combustion　engine,　has　the　potential　to　become　an　alternative　for　gasoline-fueled　piston　engines.　Cooled　EGR,　as　an　effective　means　of　improving　engine　performance,　is　less　studied　based　on　HWRE.　However,　due　to　the　different　operating　way　and　structure,　the　flame　development　and　propagation　of　WRE　are　significantly　different　from　those　of　the　piston　engine,　so　may　the　effect　of　cooled　EGR.　Hence,　the　goal　of　present　work　is　to　analyze　the　effect　of　cooled　EGR　on　the　combustion　characteristics　of　HWRE.　This　work　is　conducted　under　1500　r/min　and　wide-open　throttle　conditions.　The　results　show　that　when　the　ignition　timing　and　excess　air　ratio　are　fixed　at　5　degrees　CA　ATDC　and　1,　the　cooled　EGR　level　has　a　significant　influence　on　the　combustion　process　and　operating　stability.　In　addition,　when　maximum　brake　torque　CA50　is　employed,　within　test　range,　whether　stoichiometric　or　lean　combustion,　both　the　brake　torque　and　brake　thermal　efficiency　are　monotonous　to　the　cooled　EGR　level.　And　cooled　EGR　can　achieve　high　brake　thermal　efficiency　compared　with　lean　combustion　at　the　same　brake　torque.　Compared　with　the　hydrogen-fueled　piston　engine,　HWRE　allows　for　a　higher　cooled　EGR　level　whether　in　terms　of　efficiency　or　power　output　considerations.　In　general,　the　cooled　EGR　can　be　used　as　an　excellent　load　control　means　to　achieve　high　efficiency　of　HWRE.