USB socket electric connector and combination of USB socket electric connector and circuit board

The utility model provides a USB socket electric connector. The USB socket electric connector comprises a shielding shell, an insulation body, multiple rows of upper terminals, and multiple rows of lower terminals, wherein the shielding shell comprises an accommodation groove, the insulation body is disposed in the accommodation groove, the insulation body comprises a base seat and a tongue plate, the tongue plate is formed at a side of the base seat in a stretching manner; the multiple rows of lower terminals are adjacent to the multiple rows of upper terminals, the multiple rows of lower terminals comprise multiple signal terminals and multiple power supply terminals; the multiple power supply terminals are located on the insulation body, the multiple power supply terminals are adjacent to the multiple signal terminals and are located at the same horizontal level with the multiple signal terminals, the multiple power supply terminals comprise multiple second interference root parts, multiple second contact parts, multiple second stretching parts, and multiple second welding parts; and the width of the multiple second interference root parts, the width of the multiple second stretching parts, and the width of the multiple second welding parts increase relatively.