Amorphous　electrode　has　been　witnessed　for　enhanced　electrochemical　performance　as　unique　isotropic　nature.　Moreover,　the　fancy　structures　are　beneficial　to　achieve　superior　electrochemical　properties.　However,　it　is　a　formidable　challenge　to　acquire　an　electrode　material　which　keeps　both　amorphous　phase　and　organized　morphology　via　a　simple　preparation　method.　In　a　departure　of　other　sophisticated　methods,　ball　milling　could　easily　introduce　amorphous　phase　with　unique　merits　such　as　more　interstitial　sites　for　rapid　diffusion　of　Li　ions,　and　more　void　spaces　for　accommodation　of　volume　change　than　the　crystalline　phase.　In　our　work,　3D　hierarchical　porous　electrodes　were　designed　and　synthesized　via　KCl-assisted　ball　milling　method.　Owing　to　the　unique　merits　including　crosslinked　3D　porous　network,　amorphous　manganese　vanadate　buffer　layer　and　numerous　oxygen　defects　introduced　during　the　KCl-assisted　milling,　the　as-prepared　electrode　showed　boosted　electrochemical　performance.　The　as-prepared　electrodes　delivered　a　capacity　as　high　as　540.55　mAh　g−1　after　500　cycles　at　2　A　g−1　with　98.78%　capacity　retention　and　85.39%　after　900　cycles.　In　brief,　KCl-assisted　ball　milling　provided　a　feasible　and　efficient　approach　to　achieve　3D　hierarchical　porous　electrodes,　casting　light　on　new　approach　of　developing　advanced　electrode　materials　with　the　organized　morphologies　and　amorphous　phase.　©　2021　Elsevier　B.V.