Abstract: Cold deformability,mechanical properties and conductivity of large round ODSC were investigated from the aspects of composition and granularity ratio. Moreover,study on the homogenization of this large round ODSC was also conducted. The results showed that the deformability of the large round ODSC decreased with the increasing of aluminium content and the fine power proportion. When the aluminuium conten increased,the hardness exibited linear increase at first and then became level,while the conductive property kept decreasing. Annealing treatment could reduce the non-uniformity of the ODSC after cold drawing.