The invention provides an insulated bolt partial discharge performance test device, which comprises a supporting assembly, a measuring bucket assembly, an electrode assembly and a test sample assembly, wherein the bottom part of the measuring bucket assembly is opened and the top part is provided with a first sealing cover; the measuring bucket assembly is connected with the supporting assembly for accommodating the electrode assembly and the test sample assembly; the test sample assembly and the electrode assembly are arranged at the top part and the bottom part inside the measuring bucket assembly side by side; the test sample assembly is connected with the side wall of the measuring bucket assembly for placing a to-be-tested insulated bolt; and the electrode assembly is connected with the side wall of the measuring bucket assembly for enabling the to-be-tested insulated bolt to be arranged in a penetrating mode on the electrode assembly and carrying out partial discharge performance test on the to-be-tested insulated bolt. Thus, one end of the to-be-tested insulated bolt is fixed on the test sample assembly and the other end is arranged on the electrode assembly in a penetrating mode, an external partial discharge device applies voltage to the electrode assembly, partial discharge performance test is thus carried out on the to-be-tested insulated bolt, and the insulation stability of the converter transformer-used insulated bolt is ensured.