The invention discloses an end cover discharging device and a riveting machine. The riveting machine comprises a rack. The end cover discharging device comprises a base, a forward-pushing air cylinder, a feeding unit, a downward-pressing air cylinder and a limiting air cylinder, wherein the forward-pushing air cylinder is mounted on the base, and a pushing rod of the forward-pushing air cylinder is connected with a pushing pressing rod; the feeding unit is mounted on the base, a material containing space is formed in the feeding unit, the face, facing the forward-pushing air cylinder, of the feeding unit is provided with a first guiding hole allowing the pushing pressing rod to extend in, the first guiding hole communicates with the material containing space, a feeding hole is further formed in the face, facing the forward-pushing air cylinder, of the feeding unit, and a discharging hole is further formed in the face, directly facing the feeding hole, of the feeding unit; the downward-pressing air cylinder is arranged above the feeding unit, and the top face, facing the downward-pressing air cylinder, of the feeding unit is provided with a second guiding hole allowing a pushing rodof the downward-pressing air cylinder to extend in and communicating with the material containing space; and the limiting air cylinder is arranged above the feeding unit, and the top face, facing thelimiting air cylinder, of the feeding unit is provided with a third guiding hole allowing a pushing rod of the limiting air cylinder to extend in and communicating with the material containing space.The end cover discharging device is convenient to operate and high in automation degree.