Based　on　the　FEPG　platform,　the　finite　element　program　using　gradient　plastic　theory　is　developed　to　solve　mesh　dependence　after　strain　softening.　A　u-λ　algorithm　with　damp　factor　is　proposed,　which　can　solve　the　equation　of　displacement　and　yield　surface　simultaneously.　The　algorithm　can　not　only　get　displacement　and　plastic　multiplier　together,　but　also　avoid　the　stress　haul　back　calculation　in　stress　return　algorithm　widely　used　in　finite　element　solution　procedures.　The　softening　modulus　and　the　internal　character　length　are　introduced　into　D-P　yield　function,　and　the　constitutive　model　can　consider　strain　softening　and　gradient　effect.　The　damp　Newton　algorithm　is　used　to　calculate　softening　problems.　The　results　of　a　case　study　show　that　the　u-λ　algorithm　with　damp　factor　can　be　used　to　solve　softening　problems,　the　gradient　plastic　theory　described　by　finite　element　weak　form　has　no　requirement　of　continuity,　and　appropriate　outcome　can　be　obtained　by　the　first-order　element,　thus　the　mesh　dependence　of　simulation　is　basically　solved.