Porphyry deposit is a kind of important ore deposit. Phase transition of Magma-Fluid stage in magma evolution controls the element distribution between different phases. Gold distribution between Melts and Coexisting Fluids is a important key to the metallogenic mechanism of porphyry deposits. The distribution of gold between different phases is not only controlled by temperature, pressure, oxygen fugacity, but also influenced by the content of fluids and composition of melts. Finally we reviewed the problems in experiment and future research on the partitioning of Au between melt and coexsiting fluids.