This　paper　presents　a　novel　hybrid　auxetic　structure　with　enhanced　mechanical　properties,　combining　the　re-entrant　and　double-arrowhead　structures,　based　on　the　structural　stretching-dominated　deformation　mechanism.　The　unit　cell　of　the　developed　hybrid　structure　comprises　an　external　quadrilateral　frame　and　an　internal　arrowhead　part.　The　theoretical　analysis　model　for　predicting　its　in-plane　mechanical　properties　in　the　two　principal　directions　is　presented　and　verified　by　both　numerical　simulations　and　experimental　measurements.　On　this　basis,　a　parametric　study　on　the　in-plane　mechanical　properties　of　the　hybrid　structure　is　performed　to　optimize　geometrical　parameters.　The　results　show　that　both　the　negative　Poisson＇s　ratio　behavior　and　the　elastic　properties　of　the　hybrid　structure　can　be　enhanced　by　increasing　the　length　of　the　vertical　wall　or　reducing　the　angle　of　the　inclined　wall　in　the　internal　arrowhead　part.　The　hybrid　structure,　with　the　obvious　difference　in　elastic　properties　between　the　two　principle　directions,　can　be　obtained　by　individually　adjusting　the　width　of　the　hybrid　unit　cell,　while　the　elastic　properties　in　bothdirections　can　be　improved　by　simultaneously　reducing　the　length　of　the　vertical　wall　and　the　width　of　the　hybrid　unit　cell.　In　addition,　compared　with　the　re-entrant　and　double-arrowhead　structures,　the　hybrid　structure　demonstrates　higher　elastic　moduli　and　a　wider　range　of　Poisson＇s　ratios　from　negative　to　positive.　The　study　provides　guidance　for　the　optimized　design　of　hybrid　auxetic　structures　in　practical　applications.