The invention discloses an insulating material electrical aging performance evaluation device which comprises a control device, a voltage control device, a temperature control device, a humidity control device and a sample chamber equipped with a number of sample tools, wherein the voltage control device, the temperature control device and the humidity control device are connected with a high voltage introduction unit. The high voltage introduction unit comprises a high voltage bushing and a high voltage lead. The high voltage bushing is in sealed connection with the sample chamber. The high voltage lead successively passes through the high voltage bushing, and then is connected with electrodes which are connected with the high voltage ends of the sample tools. The control device adjusts the temperature and humidity in the sample chamber and the voltage aging samples of the sample tools through the voltage control device, the temperature control device and the humidity control device. The insulating material electrical aging performance evaluation device provided by the invention has the advantages of small space occupation, simple structure, convenient use, wide application range and high practicability. The test device and the detection method can effectively evaluate the electrical aging performance of an insulating material in working condition in actual operation, and provide an important reference for the screening of insulating materials.