Abstract: In this study, the effect of annealing time and Sb doping on Bi-based superconductor properties have been investigated. Partial substitution of Sb for Bi in the Bi1.65-xPb0.35SbxSr2Ca2Cu3Oy (BPSSCCO) superconductor has been found to increase the volume fraction of Bi (2223) phase. The BPSSCCO superconductor is made by solid state reaction method, using Bi2O3, PbO, CuO, CaCO3, SrCO3 and Sb2O3 powders as starting material. This study, reports Bi1.65-xPb0.35SbxSr2Ca2Cu3Oy compound properties with x = 0.0, 0.03, 0.05 and 0.07 as variable. For that the effect of annealing time and amount of Sb doping on BPSSCCO microstructure, critical temperature and critical current density have been investigated. The structural analysis was carried out using XRD, SEM and EDX instruments. Both the critical temperature (Tc) and critical current density (Jc) were measured at 77 K. The critical current density was performed via V-J measurement in liquid nitrogen. The X-ray diffraction patterns show that low amount of Sb beside long annealing time enhance the fraction of Bi (2223) phase as well the critical current density. In order to study the effect of Sb on resistivity at room temperature, the V-I curves in the samples were measured. The resistivity of Sb doped samples at room temperature increases directly with increases of Sb. On the contrary, it is decreases by annealing time increase.