Test tool for vacuum arc-extinguishing chamber of circuit breaker

The invention discloses a test tool for a vacuum arc-extinguishing chamber of a circuit breaker. The test tool comprises a device main body, a vacuum bubble assembly, a jacking device, a fixed electrode, a switching-on assembly and a switching-off assembly, the vacuum bubble assembly comprises a vacuum bubble and a moving contact; the vacuum bubble is arranged on the device main body and is internally provided with a static contact; the moving contact is arranged on the vacuum bubble in a sliding manner; the jacking device is positioned below the moving contact; the fixed electrode is arranged on the device main body and is electrically connected with the static contact; the closing assembly comprises a conductive base and a connecting electrode; the conductive base is connected with the connecting electrode; the opening assembly comprises a connecting seat, an upper bolt and a lower bolt. The upper bolt is positioned above the connecting seat; the lower bolt is positioned below the connecting seat; a lower s