Flax threshing and straw smashing device

The utility model belongs to the field of threshing and straw smashing devices, and discloses a flax threshing and straw smashing device which comprises a supporting assembly, a smashing assembly is arranged above the supporting assembly and comprises a knockout chamber, a roller is arranged in the knockout chamber, a rotating rod is arranged on the roller, and the rotating rod is connected with the supporting assembly. A first belt wheel is arranged at one end of the rotating rod, the first belt wheel is in transmission connection with a belt, the supporting assembly and the smashing assembly are connected through rivets, a mounting table is arranged on the supporting assembly, and a power assembly is mounted on the mounting table; the power assembly and the crushing assembly are connected through a belt, a feeding port is formed in the upper portion of the crushing assembly, a discharging port is formed in one side of the crushing assembly, a baffle is arranged on the discharging port, a grain outlet is for