The invention discloses a portable detachable signal adapter, which is characterized by comprising an adapter casing, wherein the adapter casing is provided with a transversely extending core sleeve at the center of the adapter casing, two sides of the adapter casing are fixedly provided with signal bases with left-right symmetrical distribution, and a signal adapter component is arranged on the signal base. The invention integrally solves the technical defects of the prior signal switching device, such as the lack of the assembled structure design, the compatibility and expansion design of the switching signal, and the quick disassembling and disassembling design of the device.