One-dimensional　Si　nanostructures　with　carbon　coating　(1D　Si@C)　show　great　potential　in　lithium　ion　batteries　(LIBs)　due　to　small　volume　expansion　and　efficient　electron　transport.　However,　1D　Si@C　anode　with　large　area　capacity　still　suffers　from　limited　cycling　stability.　Herein,　a　novel　branched　Si　architecture　is　fabricated　through　laser　processing　and　dealloying.　The　branched　Si,　composed　of　both　primary　and　interspaced　secondary　dendrites　with　diameters　under　100 nm,　leads　to　improved　area　capacity　and　cycling　stability.　By　coating　a　carbon　layer,　the　branched　Si@C　anode　shows　gravimetric　capacity　of　3059　mAh　g-1　(1.14　mAh　cm-2　).　At　a　higher　rate　of　3　C,　the　capacity　is　813　mAh　g-1　,　which　retained　759　mAh　g-1　after　1000　cycles　at　1　C.　The　area　capacity　is　further　improved　to　1.93　mAh　cm-2　and　remained　over　92%　after　100　cycles　with　a　mass　loading　of　0.78 mg　cm-2　.　Furthermore,　the　full-cell　configuration　exhibits　energy　density　of　405 Wh　kg-1　and　capacity　retention　of　91%　after　200　cycles.　The　present　study　demonstrates　that　laser-produced　dendritic　microstructure　plays　a　critical　role　in　the　fabrication　of　the　branched　Si　and　the　proposed　method　provides　new　insights　into　the　fabrication　of　Si　nanostructures　with　facility　and　efficiency.