The USB female connector contains an insulating base and a shielding casing enclosing the insulating base. On the insulating base, there is mainly a ground terminal having a flat ground contact section at an end on the insulating base. From the ground contact section, the ground terminal is extended away from the insulating base and forked into a first ground extension section, a second ground extension section, and a third ground extension section. Through the forked first, second, and third ground extension sections, the high-frequency crosstalk problem is effectively resolved.