A coated infiltration growth technique was proposed to fabricate single-grain Y?Ba?Cu?O bulk superconductor, in which a liquid source coated Y2BaCuO5 (Y-211) preform was employed and the liquid source composition was 3BaO+5CuO. Experimental results indicated that, the sample exhibited a single-grain morphology on the top surface, and the liquid source coating always existed surrounding the bulk which contributed to the complete growth of the sample. The homogeneous distribution of fine Y-211 inclusions in microstructure and a satisfactory J(c) performance of 5.67x10(4)A/cm(2) in self-field at 77K have also been observed.