Synthesizing　high-performance　of　gel　polymer　electrolytes　(GPEs)　with　simple　methods　and　common　materials　has　long　been　a　crucial　concern　for　lithium-ion　batteries.　Here,　the　poor　mechanical　properties　of　polyethylene　oxide　(PEO)　based　GPEs　were　overcome　by　introducing　strong　hydrogen　bond　between　PEO　and　polyacrylic　acid　(PAA).　Easy-available　PEO/PAA　membranes　were　prepared　though　hot　processing　approach　without　use　of　organic　solvent　during　all　processes.　The　mechanical　properties　and　crystalline　of　dry　composites　could　be　tuned　by　the　addition　content　of　PAA.　After　quick　absorbing　electrolyte　in　30　min,　the　tensile　strength　and　elongation　at　break　of　the　GPEs　composites　are　ranged　from　0.07　to　0.63　MPa,　and　525%　to　722%.　Moreover,　the　lithium-ion　conductivity　and　transference　number　with　30　wt%　addition　of　PAA　reach　up　to　1.66　and　0.58　mS/cm,　respectively.　After　500　cycling　at　0.5　C,　the　discharge　specific　capacity　and　the　capacity　retention　rate　are　still　up　to　134.1　mAh/g　and　88.7%,　respectively.　This　research　proves　the　great　possibility　of　applying　environmentally　friendly　method,　low　cost,　and　high　electrochemical　performances　of　PEO/PAA　based　GPEs　in　the　lithium　batteries.　©　2024　Wiley　Periodicals　LLC.