Surface treatment method for use in production of electrolytic copper foil

The invention relates to a surface treatment method for use in production of an electrolytic copper foil. The method comprises acid washing pretreatment, primary roughening, washing with a roughening liquid, primary curing, washing with the roughening liquid, secondary roughening, washing with the roughening liquid, secondary curing and washing with the roughening liquid. The roughening liquid consists of 15-20g/L Cu and 50-60g/L H2SO4, and the temperature is 30-40 DEG C. According to the method, the using amount of pure water is saved, the roughness of a copper foil treatment surface can be lowered, and the defects of burrs on foil surfaces and copper nodule indentations caused by higher roughness are avoided effectively.