the present invention provides a method to prepare a srcacuo - 2223 superconducting wire with improved critical current density at reduced cost . in general , the basic method according to the present invention comprises the steps of : preparing a starting precursor powder with the oxygen content adjusted to the value of the final 2223 phase ; filling the starting powder into a metal sheath ; performing deformation processing on the metal sheath to form a composite wire and develop texture in the 2212 superconducting phases ; sealing said metal sheath so that a fixed oxygen content is maintained ; performing sintering to obtain the srcacuo - 2223 phase . the method uses metals other than a silver - based material in the sheath material , thus significantly reducing the materials cost of the srcacuo - 2223 superconducting wire .