Large size single-lead tungstate crystals with yttrium doping were produced at Shanghai Institute of Ceramics by modified Bridgman method along <001> orientation. Longitudinal transmittance, transverse transmission uniformity, photoluminescence, light output, decay kinetics and light output uniformity of samples with dimension of 30 x 30 x 220mm(3) were studied. It was found that crystals we made for high-energy physics is highly uniform both in optic and scintillation. (C) 2004 Elsevier B.V. All rights reserved.