A dual-interface switch circuit and a Type-C hub. The dual-interface switch circuit comprises: two first interfaces; a detection circuit (12) for generating a corresponding detection signal when a first interface is connected to an external device; and a control circuit (13) for transmitting, when determining, according to the detection signal, that the corresponding first interface is connected to a power supply signal, the power supply signal to the other first interface for output, the other first interface being an interface for transmitting a data signal, wherein the control circuit (13) is further configured to switch, when determining, according to the detection signal, that the corresponding first interface is connected to a data signal, to use the other first interface as an interface for transmitting the power supply signal. The present application implements dual-interface blind mating, and can automatically recognize the type of a device connected to an interface, thereby automatically switching data signal transmission paths, flexibly configuring an interface function, ensuring and improving the data transmission efficiency of an interface, improving the extensibility of the interface function, and improving the reliability and applicability of a dual-interface switch circuit.