Abstract: In order to further analyze the operation characteristics of advanced adiabatic compressed air energy storage sytem assisted by concentrating solar power（AA-CAES+CSP） system,the relevant model is established on the basis of AA-CAES system,performance of two systems is compared with each other,and the effects of key parameters on the performance of AA-CAES+CSP system are investigated.The results show that compared with AA-CAES system,cycle efficiency of AA-CAES+CSP system increases by 7.90%and energy storage density increases by 4.46%.When the number of compression stage N₁ is equal to the number of expansion stage N₂,the cycle efficiency and energy storage density are the highest.In addition,the smaller the difference between N₁ and N₂ is,the better system performance is.With the increase of heat transfer coefficient h_c,cycle efficiency firstly drops and then slowly increases,and energy storage density continuously increases.When h_c is relatively small,the larger the number of system stage N is,the lower cycle efficiency h_c is.However,the opposite thing happens when h_c is relatively large,but energy storage density continues to increase with N.In addition,the larger N is,the smaller the impact of h_c on system performance is.When maximum pressure ratio of air storage chamberβ_max increases,cycle efficiency decreases and energy storage density increases.In addition,when β_max is relatively small,the larger N is,the lower cycle efficiency is and the larger energy storage density is.However,when β_max is relatively large,cycle efficiency and energy storage density increase with N.