Method and device for detecting faults of main touch point of high-voltage direct-current contact

The invention discloses a method for detecting faults of a main touch point of a high-voltage direct-current contact. Two ends of the main touch point of the direct-current contact are respectively connected with a piece of electric equipment and a first direct-current power supply; the electric equipment is connected with the first direct-current power supply; two ends of an auxiliary touch point of the direct-current contact are respectively connected with a dropping resistor and a second direct-current power supply; the dropping resistor is connected with the second direct-current power supply; the auxiliary touch point is linked with the main touch point; the method comprises the following steps of: when the first direct-current power supply needs to stop supplying power to the electric equipment, controlling to power off the voltages exerted to two ends of a direct-current contact coil; detecting the voltages at two ends of the auxiliary touch point; and if the voltages at the two ends of the auxiliary touch point are not set voltages, transmitting a first alarming signal to represent that the main touch point of the direct-current contact has adhesion faults. The invention also discloses a device for detecting the faults of the main touch point of the high-voltage direct-current contact.