The invention provides an alternating and direct current integrated intelligent charging connecting device and belongs to the field of electric bicycle charging piles. The alternating and direct current integrated intelligent charging connecting device comprises a charging pile, a direct current charger, a single-phase alternating charger, a three-phase alternating charger and a controller, an alternating and direct current charging socket is arranged and comprises a direct current charging needle, a single-phase alternating current charging needle, a three-phase alternating charging needle, a grounded needle and two auxiliary needles, and the output ends of the direct current charger, the single-phase alternating current charger, the three-phase alternating current charger and the controller are connected with the direct current charging needle, the single-phase alternating current charging needle, the three-phase alternating charging needle and six auxiliary needles of the alternating and direct current charging socket in parallel respectively through a switch device. The switch device is provided with three switches, the number of charging piles of an electric bicycle is increased, and charging convenience is improved.