Copolyamide (Co-PA) hot melt adhesives, including granules and powders of different particle sizes, are high-performance adhesive materials obtained by copolymerization of caprolactam, dibasic acid and diamine. It has excellent flexibility, chemical resistance and high and low temperature stability, environmental protection and no odor. It is suitable for textile, footwear, automotive interiors, electronics and other fields, with strong adhesion to a variety of materials. Fast curing and easy processing, recyclable, to meet the needs of efficient and environmentally friendly industrial bonding.