An aging treatment method for an AGM accumulator grid is conducted according to the following steps that the to-be-processed grid is put on a grid bracket, and the grid bracket is located in an agingroom; steam is introduced into the aging room, the interior of the aging room is kept at the temperature range of 90-120 DEG C and the humidity range of 90-100%, and the grid is kept in the high-temperature and high-humidity environment for 2-5 h; steam is stopped from being introduced into the aging room, the high temperature range of 80-120 DEG C and the humidity range of 20-40 % are kept, and the grid is kept in the high-temperature and low-humidity environment for 4-7 h; the grid processed in the two stages of high-temperature and high-humidity, and high-temperature and low-humidity is putin the natural environment to be cooled. Surface treatment on the grid is completed at the same time of the aging procedure, the processing quality and production efficiency of the grid can be improved, and under the condition of basically not increasing the production cost, the grid achieves good mechanical performance and a large specific surface area.