The PVC hard series products are modified materials made by blending polyvinyl chloride as the matrix, reducing or not adding plasticizers, and combining stabilizers, fillers, and reinforcing agents. The material has high hardness, high strength, excellent weather resistance, chemical corrosion resistance, and environmental compliance, with good dimensional stability. Suitable for automotive dashboard frames, door panel brackets, pillar trim frames, center console frames, and various automotive interior components that require high rigidity and structural strength.