Horizontal casting machine is one of the key equipments of the continuous casting production line for aluminum ingot, the stable running of transporting chain has direct effects on the surface roughness of the finished aluminum ingots and the technical data of the machine. The casting machine supports are the main carriers of molds,the drive chain and other components,which have long-term work in hot and humid environment and easily leads to the running stationarity of transporting chain reduced. So in order to improve the operation stability of the transporting chains of the casting machine and the surface roughness of the finished aluminum ingots, the sequential coupling analysis methods of thermal structural coupled analysis module of the finite element software ANYSYS is used to analysis of thermal deformation and temperature field simulation for the casting machine supports, and determine the size and distribution pattern of the thermal deformation and thermal stress of the casting machine bearing parts,the simulation results provide a theoretical basis for new product design and development work in the selection ,structure and layout optimization.