High tenacity 100% polyester yarn is a lubricated super high tenacity 100% filament polyester yarn which has a uniform construction and is resistant to sunlight and chemical degradation. It has low extensibility and shrinkage 2%~3% in boiling water. High tenacity 100% polyester yarn is an exceptional yarn of its type with dependable sewing performance in high-speed and critical sewing operations, and it can be used for footwear, handbag, leather goods and kinds of clothes.