The interracial heat-transfer coefficient at casting/mould interface is a key factor that impacts the simulation accuracy of solidification progress. At present, the simulation result of using available data is comparatively different from the practice. In the current study, the methods of radial heating and electricity measurement under steady-state condition were employed to study the nature of interfacial heat-transfer between A356 Aluminum alloy and metal mould. The experimental results show that the interracial heat-transfer between A356 Aluminum alloy and the outer mould drops linearly with time while that of A356 aluminum alloy and the inner mould increases with time during cooling. The interracial heat-transfer coefficient between A356 aluminum alloy and mould is inversely proportional to the electrical resistance.