The utility model relates to a cock valve core structure, which comprises a valve seat, a water mixing valve, a rotating tee connecting piece and a diverter valve, wherein the water mixing valve, the rotating tee connecting piece and the diverter valve are matched and connected correspondingly to form a waterway to be arranged in the valve seat; the valve seat is a through tube body; the middle part of the valve seat is provided with a notch; the water mixing valve is arranged in the upper space of the valve seat; the rotating tee connecting piece is positioned at the position of the notch in the middle part of the valve seat; the diverter valve is positioned in the lower space of the valve seat; and the rotating tee connecting piece can swing right and left relative to the valve seat. After adopting the structure, a cock valve core has clearer waterway and better sealing performance so as to guarantee that water quality cannot be polluted by a cock shell and achieve the healthy and environment-friendly effects.