Aiming at the problem of insufficient adaptability of the vibration excitation device during the vibration aging treatment of large steel structures,the current inertial vibration excitation device was analyzed,and a multi-dimensional vibration aging vibration exciter was designed.TRIZ theory system function analysis and causal axis analysis were used to determine the reasons for the lack of adaptability of inertial vibration excitation devices,and solutions to the insufficient adaptability problem of inertial vibration excitation devices were obtained by adopting the technical contradiction solving principle,physical contradiction solving principle,and the matter-field model method.The structural design of the multi-dimensional vibration aging exciter was completed,and modal analysis on the key components of the main support was carried out.The design feasibility of the multi-dimensional vibration aging exciter was verified.The results show that the multi-dimensional vibration aging exciter has the advantages of strong adaptability,high excitation frequency,multi-dimensional vibration,etc.,which improves the efficiency and automation of vibration aging treatment,and meets the actual work needs of multi-dimensional vibration aging treatment.