Synthesis of nano-particles Bi2Sr2(Ca1,5Nd0,25Gd0,25)Cu3Oz (BSCNGCO) superconductors has been successfully done by the wet mixing method. The aim of the study was to produce nanoparticles of BSCNGCO superconductors and study magnetic properties at room temperature. In this research, the raw material used in the formation of BSCNGCO superconductors is Bi2O3 (99.9%), SrCO3 (99.9%), CaCO3 (99.9%), CuO (99.9%), Nd2O3 (99.9%) and Gd2O3 (99.9%). The synthesis process was conducted by added with HNO3 and mixing by a magnetic stirrer to obtain a homogeneous solution, then continued with the calcination process at 450