A bidirectional duplex electrical connector includes: a circuit board, which is provided with two sets of circuits; a base seat; a connection portion connected to a front end of the base seat, and provided with top and bottom surfaces respectively provided with two connection interfaces including two rows of electrical connection points electrically connected to the two sets of circuits, one pair of electrical connection points with a same circuit are electrically connected together through the circuit board, and a shape of the connection portion allows one docking electrical connector to be dual-positionally and bidirectionally docked; and a fitting slot provided on the base seat. The circuit board is fit with and locks the fitting slot. A combination of the bidirectional duplex electrical connector and a docking electrical connector is also provided.