Abstract: Maximum thermal stress of air receiver for solar tower is proportional to its temperature varying ratio,and air outlet temperature dynamic characteristic relates to power characteristic of the solar tower power generation system. Based on assimilate heat and electricity theory,the energy flow model of silicon carbide foam ceramic absorber in tower solar power generation system is established by using heat transfer coefficient between air flow and ceramic foam and Rosseland radiation model to describe the heat transfer process in which the properties of air are considered variable with temperature. By comparing the simulation results,the heat transfer between air flow in which and ceramic foam was studied,and the influences of the average energy flow density,the thickness of the air receiver and the average cell size on the outlet air temperature and the temperature of the heat absorber are analyzed,which provides a theoretical basis for the design of this kind of air receiv.