The invention relates to a copper bar device for power equipment field test. An even number of copper bar conductors are uniformly fixed to the inner ring of an insulated support circular framework along the circumference of the insulated support circular framework. The copper bar conductors and the insulated support circular framework are sleeved with an insulated outer cylinder. An insulated upper disc is provided with an even number of first long through holes corresponding to one ends of the copper bar conductors. An insulated lower disc is provided with an even number of second long through holes corresponding to the other ends of the copper bar conductors. One ends of the copper bar conductors are bent after passing through the first long through holes in a one-to-one manner, and first bent parts at one ends of the copper bar conductors fit the back side of the insulated lower disc. The other ends of the copper bar conductors are bent after passing through the second long through holes in a one-to-one manner, and second bent parts at the other ends of the copper bar conductors fit the back side of the insulated upper disc. The copper bar device has the advantages of reasonable structure, simple processing, low resistance, large carrying current, easy field use, and modular expansion.