The phase diagram, liquidus projection and isothermal section (25 °C) of Au-Pd-Zr system alloys and vertical section of xAu-xPd-Zr system were calculated by Calphad soft ware Pandat and the phase equilibria and solidification sequence of the alloy 36Au-36Pd-28Zr were compared with the experimental results of OM, SEM and EDS. The results show that the calculated thermodynamic results of phase equilibria agree well with the experimental results. The solidification sequence of 36Au-36Pd-28Zr is as following: L→L+Pd3Zr→L+Pd3Zr+ ZrAu2→Pd3Zr+ZrAu2+ ZrAu3