The invention discloses a method and a device for detecting contact resistance of a probe, wherein the detection device comprises a variable-resistance module, a pressure dividing module, a first test electrode, a second test electrode, a power supply and a switch, wherein the variable-resistance module is connected with the pressure dividing module in series; the first test electrode and the second test electrode are connected to two ends of the pressure dividing module respectively; and the variable-resistance module has at least three variable resistance values. The method and device for detecting the contact resistance of the probe can correctly test the contact resistance of the probe for a test device so as to ensure measuring performance of the test device and to lay a basis for accurate test thereof.