Johnson's(EAM) model combined with molecular dynamics method was used to simulate Au_(85) atomic nano clusters melting and solidification process. The Au_(85) atomic nano clusters melting point, freezing point and structure of the cluster were researched. In the analysis of potential energy and temperature dependence of the heat capacity in the process, the change of Au_(85) atomic nano clusters in the melting and solidification point of melting and solidification process is not in linear.And the negative h...