Basalt fiber chopped yarn is a product made by chopped continuous basalt fiber strands. The fiber is coated with (silane) wetting agent. Therefore, basalt fiber chopped strand yarn is the preferred material for reinforcing thermoplastic resin, and it is also the best material for reinforcing concrete. Basalt is a high-performance volcanic rock component. This special silicate gives basalt fiber excellent chemical resistance, especially alkali resistance. Therefore, basalt fiber is an excellent material to replace polypropylene (PP) and polyacrylonitrile (PAN) to strengthen cement concrete; it is also an alternative to polyester fiber, lignin fiber and other highly competitive products used in asphalt concrete, which can improve High temperature stability, low temperature crack resistance and fatigue resistance of asphalt concrete. The basalt fiber yarn is made into a basalt fiber bulked yarn through a high-performance bulk yarn machine. The forming principle is: high-speed air flow enters the forming puffing channel to form a turbulent flow, and this turbulent flow is used to disperse the basalt fiber to form a pile-like fiber, thereby giving the basalt fiber bulkiness and manufacturing a bulked yarn.