Friction stir additive manufacturing device capable of preparing nano-particle reinforced metal matrix composite

The invention discloses a friction stir additive manufacturing device capable of preparing a nanoparticle reinforced metal matrix composite, and belongs to the field of friction stir additives. The particle conveying mechanism is fixedly assembled on the support. And a small end opening of a composite material discharging barrel of the mixing and extruding mechanism is connected with a feeding opening of the stirring friction material increasing main shaft in a sealing manner. The support is fixedly connected to the lower portion of a spindle box of the stirring friction spindle. The bar conveying mechanism is fixed to the side wall of a spindle box of the stirring friction spindle. A small end opening of a powder outlet of the particle conveying mechanism is connected with a small hole in a discharging barrel of the bar conveying mechanism. And a small port of a discharging barrel of the bar conveying mechanism is connected with a connector of the mixing and extruding mechanism. According to the device, the