Lithium　sulfur　batteries　(LSBs)　with　high　energy　density　hold　some　promising　applications　in　the　wearable　and　flexible　devices.　However,　it　has　been　still　challenging　to　develop　a　simple　and　feasible　approach　to　prepare　flexible　LSB　cathodes　with　both　robust　mechanical　strength.　Herein,　flexible　S@C-CNTs　cathodes　with　controllable　thicknesses　are　successfully　fabricated　via　a　facile　blade-coating　method.　Due　to　the　strong　cohesion　among　CNTs　bundles　and　the　well-designed　structure,　the　flexible　S@C-CNTs　cathodes　are　demonstrated　to　be　with　a　combination　of　impressive　mechanical　strength　and　enhanced　electrochemical　performance.　For　the　flexible　S@C-CNTs　cathodes　with　the　sulfur　mass　loading　of　4　mg　cm−2,　the　areal　capacity　is　close　to　3.0　mA　h　cm−2,　and　the　breaking　stress　is　up　to　5.59　MPa　with　7.77%　strain.　Meanwhile,　the　pouch　cell　exhibits　excellent　cyclic　stability　at　both　flat/bent　conditions.　All　demonstrate　that　the　flexible　S@C-CNTs　cathodes　may　satisfy　the　demands　of　practical　application.　Moreover,　this　methodology　is　suitable　for　designing　other　flexible　battery　electrodes,　such　as　flexible　Si@C-CNTs　anodes　for　lithium　ion　batteries,　flexible　P@C-CNTs　anodes　for　sodium/potassium　ion　batteries,　etc.　©　2021　Elsevier　Inc.