The invention discloses a novel disc spring. The novel disc spring is characterized by comprising a spring body, vibration reducing holes and a vibration reducing gasket. Multiple vibration reducing holes are formed in the spring body; and the vibration reducing gasket is arranged on the inner wall of the spring body. The novel disc spring has the following beneficial effects: the disc spring is aspecial spring conical in the axial direction and bearing loads; after the disc spring bears the loads to deform, a certain potential energy is stored; and when a bolt is loosened, the disc spring releases one part of potential energy to keep the flange connecting pressure to meet the sealing requirements. The stress distribution of the disc spring is uniformly and gradually reduced from inside to outside to achieve the effects of low travel and high compensation force. The vibration reducing holes can achieve a vibration reducing effect to improve the absorption and buffer capacity. The vibration reducing gasket achieves a vibration reducing effect on the internal of the disc spring.