Nb5+-doped　YBCO　film　was　fabricated　successfully　by　low-fluorine　metal　organic　deposition　(MOD)　method.　The　effective　pinning　centers　in　doped　film　are　attributed　to　Nb-containing　nanoparticles　with　the　size　of　20-30　nm.　Measurement　results　show　that　the　texture　and　critical　temperature　of　the　doped　film　are　not　influenced　obviously　by　the　nanopartides.　In　addition,　a　significant　enhancement　of　J(c)　is　observed　for　YBCO　films　with　nanoparticles　compared　to　that　of　pure　YBCO　film　by　the　field　dependence　of　J(c)　values.　The　self-field　critical　current　density　reaches　as　high　as　3.4　MA/cm(2),　and　the　peak　pinning　force　(F-p)　of　the　doped　film　is　greatly　increased　than　the　pure　one,　which　reaches　at　3.25　GN/m(3).