This　paper　investigates　the　performance　of　the　protograph-based　low-density　parity-check　(LDPC)　codes　for　2-D　intersymbol　interference　(ISI)　channels　with　magnetic　recording　density.　The　protograph　LDPC　codes　have　been　shown　to　possess　simple　hardware　implementation　and　excellent　error　performance　over　additive　white　Gaussian　noise　channels　and　over　partial　response　channels.　We　propose　a　design　scheme　and　construct　two　new　protograph　LDPC　codes　for　2-D　ISI　channel,　with　the　help　of　extrinsic　information　transfer　chart　analysis　and　asymptotic　ensemble　weight　distribution　analysis.　The　theoretical　analyses　and　simulated　results　show　that　the　proposed　codes　outperform　the　previously　optimized　irregular　LDPC　code　in　both　low-　and　high-SNR　regions.　Thus,　the　proposed　codes　are　good　alternatives　compared　with　other　error-correction　codes　for　the　use　in　magnetic　recording　systems.　©　2015　IEEE.