Laser 3D printing additive repair technology is an advanced process that forms three-dimensional solid parts layer by layer from materials based on digital models. Adopting an additive manufacturing approach, it enables precise forming from scratch. As a key component of the scraper conveyor, the flight bar undergoes long-term high-intensity friction with coal gangue, resulting in severe surface wear, frequent replacements and high costs. Laser 3D printing additive repair technology gives worn flight bars a new lease of life, with performance exceeding that of new parts.