The present invention provides a device and method for detection of an insulation tool. The device provided by the invention comprises: at least two test chambers, a first test chamber and a second test chamber being configured to dispose a first insulation tool to be detected and a second insulation tool to be detected, the chamber bodies of the test chambers being not communicated and being able to conduct, the chamber body of the first test chamber being configured to detect parts to connect with the cathode of a power supply or the earth through a first cathode signal, and the chamber body of the second chamber being configured to detect parts to connect with the cathode of the power supply or the earth through a second cathode signal; a first conductive part which has a first end connected to the anode of the power supply and a second end connected with inner chambers of the first insulation tool to be detected and the second insulation tool to be detected; and a first anode signal detection part arranged on the first conductive part, faults of the first insulation tool to be detected being displayed when leakage signals are detected by a first anode signal detection part and a first cathode signal detection part, and faults of the second insulation tool to be detected being displayed when leakage signals are detected by a first cathode signal detection part and a second anode signal detection part.