A starting powder for sintering of superconductors in the Bi(Pb)-Sr-Ca-Cu-0 system was prepared by calcining the mixture of a high Tc phase (Bi_1.8Pb_0.4Sr_2.0Ca_2.0Cu_3.2O_y) and 0.4 mol CaC0₃ at 800°C for 2h. The sintered compacts were obtained by the two-step sintering. where the starting powder which was press formed at 1-5t/cm², was primarily sintered at 850t for 20h, then re-press formed at 2-5t/cm² and finally sintered at 8501; for 120h. The effects of the re-press forming on the densification behavior and superconducting properties were investigated by employing the above two-step sintering. The bulk density of the compact which was primarily sintered after press forming at 3t/cm² was 4.2g/cm³, while the density increased up to 5.2g/cm³ by secondary sintering after re-press forming at 5t/cm². A linear relation was found between the Jc values and the bulk densities of the compacts, which were prepared by one-step sintering or two-step sintering at 8500 for 120h. The Jc(77K) value of the compact of theoretical density was estimated by extrapolation to attain a magnitude of 10⁴A/em².