A　dynamic　stall　will　cause　dramatic　changes　in　the　aerodynamic　performance　of　the　blade,　resulting　in　a　sharp　increase　in　the　blade　vibration　load.　The　bionic　leading-edge　airfoil　with　different　waviness　ratios,　inspired　by　the　humpback　whales　flipper,　is　adopted　to　solve　this　problem.　In　this　study,　based　on　the　NACA0015　airfoil,　the　three-dimensional　unsteady　numerical　simulation　and　sliding　mesh　technique　are　used　to　reveal　the　flow　control　mechanism　on　the　dynamic　stall　of　the　bionic　wavy　leading　edge.　The　effects　of　the　waviness　ratio　on　the　dynamic　stall　characteristics　of　the　airfoil　are　also　investigated.　The　results　show　that　the　peak　drag　coefficient　is　dramatically　reduced　when　a　sinusoidal　leading　edge　is　applied　to　the　airfoil.　Although　the　peak　lift　coefficient　is　also　reduced,　the　reduction　is　much　smaller.　When　the　waviness　ratio　R　is　0.8,　the　peak　drag　coefficient　of　the　airfoil　is　reduced　by　17.14%　and　the　peak　lift　coefficient　of　the　airfoil　is　reduced　by　9.20%.　The　dynamic　hysteresis　effect　is　improved　gradually　with　an　increasing　waviness　ratio.　For　the　bionic　airfoil　with　R　=　1.0,　the　area　of　the　hysteresis　loop　is　the　smallest.