In　the　past　two　decades,　the　Ministry　of　Agriculture　and　Rural　Affairs　of　China　(MARA)　has　issued　a　series　of　strict　cultivated　land　protection　policies　to　prevent　the　spread　of　farmland　abandonment　and　maintain　a　dynamic　balance　between　the　quantity　and　quality　of　arable　land.　However,　high-speed　economic　development,　strict　arable　land　protection　policies,　and　ecological　security　and　sustainable　development　strategies　interacting　with　human　activities　have　brought　challenges　to　quantifying　the　effectiveness　of　arable　land　protection　policies.　In　this　study,　we　proposed　a　method　to　quantify　the　impacts　of　the　arable　land　protection　policies　and　evaluate　the　quantitative　impacts　on　farmland　abandonment　in　Guangdong　Province　after　2014　from　the　perspective　of　landscape　ecology.　The　results　illustrated　that　the　landscape　fragmentation　of　farmland　abandonment　in　Guangdong　Province　decreased　after　the　new　arable　land　policies　were　issued.　More　annual　farmland　abandonment　(AFA)　shifted　to　seasonal　farmland　abandonment　(SFA),　revealing　the　considerable　pronounced　effects　of　farmland　abandonment　management.　The　new　policies　effectively　restrained　the　area　increase　for　AFA　in　the　regions　with　lower　rural　population　(RPOP)　and　lower　gross　domestic　product　(GDP),　and　reduced　the　fragmentation　of　AFA　in　the　regions　with　the　highest　RPOP　and　lower　GDP.　Additionally,　the　new　policies　effectively　restrained　the　fragmentation　increase　for　SFA　in　the　regions　with　lower　RPOP　and　lower　GDP,　and　reduced　the　area　increase　for　SFA　in　the　regions　with　the　highest　RPOP　and　lower　GDP.　The　management　effect　was　not　that　significant　in　the　regions　with　higher　RPOP　and　higher　GDP.　These　findings　will　provide　important　data　references　for　arable　land　decision　making　in　southern　China.　©　2022　by　the　authors.