Research modified polyester fiber subject group has: Lian Zhijun's modified polyester fiber alkali reduction research, Zhou Xuan's superhydrophobic modification of polyester fiber research and so on. Soy protein modified polyester fiber is a new type of fiber material, which is a combination of soy protein and polyester. Soy protein is a natural protein which has excellent mechanical properties to resist stretching, compression and bending, and has good abrasion and corrosion resistance. Polyester is a synthetic fiber that has excellent mechanical properties, can resist stretching, compression and bending, and has good abrasion and corrosion resistance. Soy protein modified polyester fiber is a combination of soy protein and polyester to make their performance more excellent.