We　present　a　hypoplastic　model　for　the　granular　material　to　account　for　the　particle　breakage　effect.　The　degree　of　particle　breakage　is　expressed　by　a　relative　breakage　ratio,　which　evolves　with　the　input　energy　during　the　loading　process.　The　critical　state　line　of　the　model　is　related　to　the　relative　breakage　ratio　to　reflect　the　influence　of　particle　breakage　on　the　mechanical　behavior　of　soil.　The　model　performance　is　demonstrated　by　comparing　the　model　simulations　with　the　experimental　results　under　different　test　conditions.