A card edge connector structure includes: an insulation main body, having one side disposed with an insertion surface and having another side disposed with an installation surface; the insertion surface has an insertion port; two electrical conductive terminal sets, disposed in the insulation main body with a parallel arrangement means; each electric conductive terminal set has a positioning seat, grounding terminals and electrical conductive terminals protruded from the positioning seat, each grounding terminal has an inner side, a first end exposed in the insertion port and a second end exposed on the installation surface; and a grounding plate, disposed between the two electrical conductive terminal sets; two sides of the grounding plate are extended with grounding elastic arms towards a direction of each first end, and each grounding elastic arm is elastically abutted against the inner side of each grounding terminal.