A cable status detection circuit comprises an on-chip termination resistor module, a termination discharge module, a status detection signal transmission module, and a status detection signal sampling and judgment module. Among them, the on-chip termination resistor module provides a termination resistor matching the transmission line; the termination discharge module discharges the high-speed interface of the chip to the ground before cable status detection; the status detection signal transmission module is responsible for sending detection signals during cable status detection; and the status detection signal sampling and judgment module samples the voltage status of the high-speed interface after the status detection signal transmission module sends the detection signals, judges the cable status based on the sampling data results, and locates the fault position.