The invention provides an aging and degassing device. The aging and degassing device comprises a lower box, an upper box mounted on the lower box in a sealed manner, at least one to-be-aged secondarybattery accommodated and supported on the lower box and a suction nozzle structure, wherein each to-be-aged secondary battery comprises a liquid injection hole; the suction nozzle structure comprisesa body part, an inverse suction preventing part and suction nozzles, the body part is sealed and fixedly connected with the inner peripheral wall of the upper box to form an upper space; the inverse suction preventing part is located below the body part and connected to the body part to form an accommodating cavity; the suction nozzles with the number the same as that of the liquid injection holesof the at least one to-be-aged secondary battery are connected to the inverse suction preventing part, and each suction nozzle butts against and corresponds to the liquid injection hole of one to-be-aged secondary battery in the aging process and is communicated with the liquid injection hole of one corresponding to-be-aged secondary battery, the accommodating cavity of the inverse suction preventing part and the upper space. By the aid of the aging and degassing device, the aging and degassing processes of the secondary batteries are performed simultaneously, the space occupied by equipmentis reduced, and combustible and toxic gas is prevented from leaking to the outer environment.