The ceriumdoped yttrium oxyorthosilicate crystals(Ce:YSO) with size of 65 mm×200 mm were grown by the Czochralski method with radio frequency heating. The Ce:YSO crystals with different raw material ratios were grown, and the congruent raw material ratios was demonstrated by the lightoutput measurement.The influence of technical parameter on the lightoutput uniformity was also studied in this paper. The the experimental results show that the Ce:YSO crystal grown with 0.16% ceriumdoped concentration, extra 0.10% SiO2 compensated and 60% crystallization ratio, the lightoutput and uniformity can be optimal. Modifing the technical parameters could be better for lightoutput uniformity, but the effect was limited.The light yield,decay time and afterglow time were also measured at room temperature,the results showed that the energy resolution was 7.20%@662 keV, the decay time was about 52 ns and the afterglow time was 156 ns.