Rational　synthetic　design　of　Sn4P3-based　materials　with　unique　morphological　structure　and　superior　sodium　storage　capability　for　sodium　ion　batteries　(SIBs)　is　crucially　and　urgently　needed.　In　this　work,　Sn4P3　microspheres　encapsulated　in　hollow　carbon　spheres　(Sn4P3(@C)　are　prepared　by　a　low　temperature　phosphorized　route　using　SnO2@C　as　the　precursor.　The　XRD,　XPS　and　TEM　results　show　that　multiple　Sn4P3　microspheres　with　a　diameter　of　200　nm　are　conformally　encapsulated　in　a　hollow　carbon　shell.　This　void　volume　and　the　elasticity　of　protective　carbon　spherical　shell　can　efficiently　mitigate　volume　change　of　active　Sn4P3　microspheres　and　form　the　stable　solid　electrolyte　interface　film　on　the　surface　of　the　carbon　shell　during　charge/discharge　process.　When　assembled　as　a　negative　electrode　material　into　SIBs,　the　Sn4P3@C　composite　shows　a　stable　specific　capacity　of　420　mAh　g(-1)　after　300　cycles　at　a　current　density　of　0.2　A　g(-1),　as　well　as　excellent　rate　capabilities　of　424,　310,　253,　175,　111,　78,　and　50　mAh　g(-1)　at　the　density　of　0.2,　0.5,　1,　2,　5,　10,　and　20　A　g(-1),　respectively.　More　importantly,　as-prepared　Sn4P3@C　composite　shows　ultralong　cycling　performance　(after　4000　cycles,　of　2　and　5　A　g(-1),　the　stable　capacities　are　205　and　103　mAh　g(-1),　respectively).　It　is　demonstrated　that　the　Sn4P3@C　composite　with　the　unique　morphological　design　can　improve　electrochemical　cycling　performance　and　rate　capability　of　Sn4P3.　Therefore,　it　can　be　expected　that　our　Sn4P3@C　composite　is　a　promising　excellent　anode　material　for　SIBs.