Superconductors of the yttrium system Y-Ba-Cu(123) were synthesis by solid state reaction method. The starting materials were Y2O3 , BaCO3 and CuO. The temperature for heat treatment were studied at 850 900 and 950 . The three prepared samples 900 and 950 and the Meissner effect in liquid nitrogen was repeled distrinctly. The structure of samples was qualitative analyzed by powder X-rayss diffraction spectrometry