An interface circuit, a chip comprising an interface circuit and a manufacturing method therefor. The interface circuit comprises: an I/O processing sub-circuit (101), a path selection sub-circuit (102) and at least two I/O ports (103, 104), wherein the I/O processing sub-circuit (101), the path selection sub-circuit (102) and the at least two I/O ports (103, 104) are successively electrically connected. A path selected by the path selection sub-circuit (102) enables a first electrical signal and a second electrical signal to be transmitted by means of the I/O ports correspondingly provided to a port of an external device for transmitting the first electrical signal and the second electrical signal, that is, the path selection sub-circuit (102) can customize, according to the arrangement of a port of an external device, the arrangement of the I/O ports for inputting and outputting signals of the interface circuit, so that the arrangement of the I/O ports for inputting and outputting signals of the interface circuit can be changed, so as to realize consistency between the arrangement of the I/O ports and the arrangement of the port of the external device, and there is no crossing or little crossing of connecting wires between ports, thereby reducing the complexity and cost of the making and packaging of a circuit board.
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