Silicon　has　been　considered　as　a　promising　anode　material　for　lithium-ion　batteries　owing　to　its　extraordinarily　high　capacity.　However,　the　huge　volume　expansion　during　cycling　results　in　severe　pulverization　and　disintegration　of　active　materials,　especially　when　the　particle　size　is　in　microscale.　This　challenge　can　be　addressed　by　highly　stretchable　polymer　binders　engineered　with　helical　polysaccharides.　The　elaborately　designed　binder　presents　excellent　stretchability　and　adhesive　property,　which　can　buffer　the　strain　caused　by　the　large　volume　change　and　coalesce　the　pulverized　silicon　fragments　without　disintegration.　As　a　result,　the　microsized　silicon　electrode　exhibits　high　initial　Coulombic　efficiency　of　91.8　%　and　excellent　cycling　stability　for　300　cycles.　Importantly,　when　paired　with　a　commercial　LiCoO2　cathode,　the　full　cell　manifests　a　high　areal　capacity　of　3.02　mAh　cm−2　and　superior　stability　for　100　cycles.　Our　contribution　paves　the　way　to　the　practical　application　of　microsized　silicon　for　lithium-ion　batteries.　©　2020　Wiley-VCH　Verlag　GmbH　&　Co.　KGaA,　Weinheim