The influence of precursor composition (YBa 2 Cu 3 O x and Y 1 . 6 Ba 2 . 3 Cu 3 . 3 O x ) and a procedure of PtO 2 H 2 O addition on Y 2 BaCuO 5 morphology was investigated in melt-textured Y-Ba-Cu-O oxides. It is found that the 2-1-1 morphology sensitively depends not only on the composition of the starting material but also on the adding procedure of PtO 2 H 2 O powder. In YBa 2 Cu 3 O x coarse/plate-like Y 2 BaCuO 5 particles are produced, while fine/equiaxed 2-1-1 particles are produced in Y 1 . 6 Ba 2 . 3 Cu 3 . 3 O x . On the other hand, needle-like 2-1-1 particles are produced when 1 wt.% PtO 2 H 2 O was added to Y 2 O 3 -BaCO 3 -CuO while granular 2-1-1 particles are produced when PtO 2 H 2 O was added to YBa 2 Cu 3 O x -Y 2 BaCuO 5 powder. Y 2 BaCuO 5 morphologies developed from precursors with/without PtO 2 H 2 O addition are discussed on the basis of the growth behavior of Y 2 BaCuO 5 particles at the reaction stages (the solid-state, incongruent melting and peritectic reaction) of melt-texture processing.