Manufacturing method for carbon fiber

A manufacturing method for a carbon fiber, comprising:

• performing an emulsification step that comprises uniformly mixing a silicone oil composition and an emulsifier to form an oiling agent, wherein the silicone oil composition comprises γ-divinyltriamine propylmethyldimethoxyl silane and N-(β-aminoethyl)-γ-aminopropylmethylbimethoxy silane;
• performing an oiling step that comprises soaking a carbon raw filament in the oiling agent, such that the oiling agent is adhered to a surface of the carbon raw filament to form a carbon fiber precursor;
• performing a calcination step on the carbon fiber precursor, such that the carbon fiber is formed, and
• carrying out a thermogravimetric analysis on the oiling agent in air, a weight of the oiling agent at a temperature of 273° C. to 277° C. is greater than 90% to 95% of an original weight of the oiling agent.