Black　phosphorus　has　aroused　attention　as　an　attractive　anode　for　sodium-ion　batteries,　because　of　its　high　theoretical　capacity.　Nevertheless,　its　practical　application　is　hindered　by　the　large　volume　expansion,　which　results　in　rapid　capacity　decay.　Herein,　we　report　that　this　challenge　can　be　addressed　by　using　an　elaborately　designed　binder　for　the　phosphorus-based　electrodes.　The　incorporation　of　amylose　molecules　with　helical　structures　endows　the　linear　polyacrylic　acid　polymer　binders　with　extraordinary　stretchability　and　elasticity　under　400　%　strain.　When　it　is　applied　as　a　binder　for　black-phosphorus-based　anodes　for　sodium-ion　batteries,　the　adhesion　between　the　electrode　and　the　current　collector　is　much　stronger　(2.95　N)　than　that　of　the　polyvinylidene　difluoride　(PVDF)　binder　based　one　(1.90　N).　The　electrode　delivered　a　capacity　as　high　as　1280　mAh　g(-1)　at　200　mA　g(-1)　after　300　cycles,　which　is　better　than　the　electrode　with　PVDF　binder.　Impressively,　even　after　1000　cycles,　the　electrode　with　our　binder　exhibits　a　capacity　retention　of　80　%.　Our　work　sheds　light　on　the　significance　of　the　rational　design　of　effective　binders　and　provides　a　new　strategy　to　further　improve　the　electrochemical　performance　of　phosphorus-based　materials　for　battery　applications,　which　can　be　added　on　directly　to　other　new　electrode　materials　development　strategies.