Potassium-ion　batteries　(PIBs)　are　attractive　for　energy　storage　due　to　their　obvious　cost　advantage　compared　with　lithium-ion　batteries.　However,　their　commercialization　is　plagued　by　the　lack　of　high-performance　electrode　materials.　In　this　work,　a　novel　polyanionic　anode　material　K2.13V1.52Ti0.48(PO4)3　(KVTP)　is　prepared　for　the　first　time,　which　exhibits　excellent　electrochemical　properties　when　used　as　the　electrode　material　of　a　PIB.　After　coating　with　carbon,　the　obtained　KVTP@C　composite　delivers　a　high　specific　capacity　of　136　mA·h/g　at　a　current　density　of　10　mA/g　(0.073C)　and　achieves　a　long　life　span　of　225　cycles　(ca.　7.5　months)　with　a　specific　capacity　of　106.7　mA·h/g,　corresponding　to　78.55　%　of　the　maximum　value.　Moreover,　the　framework　host　can　provide　a　capacity　of　92.6　mA·h/g　at　a　rate　of　100　mA/g　(0.73　C)　and　retains　69.3　%　of　the　initial　capacity　at　the　1000th　cycle.　The　outstanding　cycling　stability　is　attributed　to　the　robust　lattice　structure　revealed　by　ex　situ　X-ray　diffraction.　©　2022　The　Authors