Y0.5Yb0.5BCO　film　was　successfully　fabricated　by　fluorine-reduced　metalorganic　deposition　(MOD)　method　through　mixing　the　same　concentrated　YBCO　and　YbBCO　precursor　solution　with　1:1　volume　ratio.　The　film　has　strong　(001)　peaks　and　well　biaxial　texture.　The　surface　of　the　film　is　dense　without　any　cracks　and　pores.　Besides,　the　elemental　distribution　is　well-proportioned.　It　is　found　that　the　Yb　elemental　substitution　improves　the　in-field　properties　effectively,　especially　at　high　fields,　although　it　decreases　the　critical　transition　temperature　(T-c)　of　the　Y0.5Yb0.5BCO　film.　For　example,　the　J(c)　value　of　Y0.5Yb0.5BCO　film　is　as　higher　as　1.26　times　than　that　of　the　pure　YBCO　film　at　77K　and　3T　applied　field.　In　order　to　further　improve　the　property　at　lower　field,　6mol%　TaCl5　is　added　to　Y0.5Yb0.5BCO　precursor　solution　to　obtain　the　Ta5+-doped　Y0.5Yb0.5BCO　film.　The　current　carrying　ability　of　the　Ta5+-doped　Y0.5Yb0.5BCO　film　is　enhanced　within　the　measured　fields.