Top-seeded powder melting process (TSPMP) is an effective melting processing technique for the preparation of high J c bulk YBCO. The remarkable advantage of TSPMP is that it is very convenient to control the size and distribution of 211 particles within bulk YBCO. We observed the microstructure of TSPMP-YBCO sample and the mean size of 211 particles is about 500 nm and well distributed. The thickness of 123 planes is about 2 μm. The density of twins in line is about (1.2-1.6)x10 4 cm - 1 . We fabricated the YBCO bulk sample with dimensions of ⌀30mmx15 mm in batch by the TSPMP process. The maximum levitation force was measured to be 85 N at 77 K in 0.5 T, by using ⌀28mmx30 mm NdFeB magnet.