The invention discloses a passive radiator and a sound production device, the passive radiator comprises a frame, a vibrating diaphragm, a folding ring and a damping assembly, and the frame is provided with an opening; the vibrating diaphragm is arranged in the opening; the inner side of the folding ring is connected with the vibrating diaphragm, and the outer side of the folding ring is connected with the edge of the opening; the damping assembly comprises first damping pieces and second damping pieces which are connected, the first damping pieces are arranged on the surface of the vibrating diaphragm, the second damping pieces are arranged on the surface of the folding ring, the first damping pieces are arranged on the surface of the vibrating diaphragm in a central symmetry mode, the first damping pieces are made of elastic materials, and the second damping pieces are made of flexible materials. According to the passive radiator, the low-frequency vibration frequency can be improved, and the distortion phenomenon is avoided while the radiation quantity is increased.