The utility model relates to a mold oscillation load-reducing device, which is composed of a vibrating frame, bearing supports and a base, a set of airbag type cylinders are respectively mounted on the bearing supports at both sides under a supporting axle of the vibrating frame, and the expansion bag thereof is composed of two to five sections. The utility model has the functional effects that: when the vibrating frame vibrates downwards, the airbags absorb the energy and reduce the impact, and when the vibrating frame vibrate upwards, the airbags release the energy and assist a motor to do work. Therefore, the utility model ensures the constant sine vibration wave, as well as utilizing the characteristics of the airbags to reduce the system loading.