This work combines traditional Miao costumes with modern technology using AI and digital twin technology for innovative design and personalized production. AI creates drafts and patterns from southwest Chinese ethnic minorities. Through 3D modeling, 3D printing, and laser cutting, designs are produced efficiently. AIGC technology in fashion shoots creates virtual-real scenes, saving resources and overcoming real-world limits. This enhances creative expression, showcases Miao culture, and highlights modern technology's potential in fashion design, paving a new path for ethnic costume heritage.