Li　metal　is　the　prospective　candidate　of　next　generation　anode　materials.　However,　the　growth　of　dendritic　Li　during　electrochemical　cycling　has　severely　hindered　the　practical　application　of　rechargeable　Li-metal　batteries.　Herein,　＂seaweed＂　graphene　paper　(SGP)　is　designed　for　3D　matrix　of　Li　metal　anode　to　address　the　growth　of　dendrites.　SGP　has　abundantly　exposed　edges　of　graphene　sheets　and　realizes　ultrahigh　density　nucleation.　Compared　with　nonuniform　lithium　deposition　on　parallelly　stacked　GP　which　has　been　observed　by　in-situ　scanning　electron　microscopy,　electrochemical　deposition　behavior　of　Li　in　SGP　manifests　as　uniformly　distributed　granular　lithium.　Significant　decrease　of　nucleation　barrier　can　be　observed　during　the　dendrite-free　deposition.　With　the　elimination　of　dendritic　Li　growth　and　excellent　stability　of　SGP　host,　the　lithium　anode　based　on　SGP　can　run　over　2500　cycles　without　short　circuit　and　exhibits　low　voltage　hysteresis.　When　matched　with　cathode　LiCoO2,　the　full　battery　also　presents　stable　cycling.　There　is　no　trace　of　lithium　dendrite　even　after　1200　cycles　which　proves　continuously　regulating　effect　on　lithium　dendrites　by　SGP　host.　This　work　further　develops　potential　application　of　graphene　materials　in　the　Li　anode　with　high　reversibility　for　stable　cycling　Li　metal　batteries.　(C)　2021　Elsevier　Ltd.　All　rights　reserved.