The invention discloses a partial-discharge sensor safety detection circuit, which comprises a wireless transceiving circuit (a), a 555 timing detection circuit (b), a display and key unit (c) and an interface circuit (d), wherein the wireless transceiving circuit (a), the display and key unit (c) and the interface circuit (d) are each connected with the 555 timing detection circuit (b). According to the partial-discharge sensor safety detection circuit and a partial-discharge sensor safety detection method, the detection on safety issues of built-in sensors can be achieved through a safety detection device, and the detection result is sent to a data processing server side in a wireless manner, thereby avoiding harm to testing equipment and personnel safety caused by the safety issues.