The invention discloses a detection device and method for vacuum circuit breaker epoxy casting body and metal insert combination; the detection device comprises a solid-sealed polar pole, a water boiling box, an electric heating pipe, a temperature controller, a water temperature sensor, a fine-toothed comb, a power supply, a fine-toothed comb support crossbeam, a metal shield cabinet, an insulation sleeve pipe, a metal shield cabinet cover plate, a coaxial cable adapter, a Rogowsky coil, a partial discharge current leading-out wire ferrule, a partial discharge current leading-out wire annealed copper wire, an insulation cable, an insulation support frame, a signal conditioning circuit, a computer, an isolation transformer, a voltage regulator, a non-partial discharge transformer, a water resistant, a data acquisition card, an insulation cable, a capacitance attenuator, a power frequency test console, a coaxial shield cable, and a copper wire. The method combines the water boiling test with the partial discharge test, and compares partial discharge signal intensity changes before and after solid-sealed polar pole water boiling, thus determining adverse bonding conditions of the epoxy casting body and metal insert combination.