Pipe fitting riveting machine

The utility model discloses a pipe fitting riveting machine, which comprises a framework, clamping dies and riveting dies, wherein the clamping dies are used for fixing pipe fittings, and the riveting dies correspond to the clamping dies. Each riveting die comprises a hollow die shell, a die hole is arranged on a lateral surface of each die shell corresponding to a riveting position of a pipe fitting, a sliding block and a riveting block matching with the sliding block to move are arranged inside each die shell, one side of the framework is provided with first propelling mechanisms pushing the die shells to penetrate into the clamping dies and second propelling mechanisms pushing the sliding blocks to slide inside the die shells, movement of the sliding blocks drives the riveting blocks so as to lead the upper ends of the riveting blocks to be ejected out of the die holes, the framework is provided with a fixed die plate and a sliding die plate, and the fixed die plate and the sliding die plate are both provi