The invention discloses an insulator withstand voltage test device for manufacturing of a charging pile. The insulator withstand voltage test device comprises a conveyer table and two test boards. Thetwo sides of the conveyer table are respectively provided with a supporting base. The test board at one end comprises a rotating disc, measuring heads and a locating rod. The surface of the rotatingdisc is provided with a plurality of connection mounting bases. The mounting bases are uniformly and circularly arranged on the surface of the rotating disc; and the measuring heads are connected withthe mounting bases respectively. The center of the rotating disc is provided with a power cylinder. The power cylinder is internally equipped with a main cylinder and auxiliary cylinders. The main cylinder is internally provided with a main coil; each auxiliary cylinder is internally provided with an auxiliary coil; and the auxiliary coils are electrically connected with the measuring heads. Thesurface of the test board at the other end is provided with a fixation disc. The side surface of the fixation disc is connected with a grounding rod. The conveyer table is formed by a plurality of parallel rotation rollers. The test device not only can carry out fast test on insulators, but also can adjust the magnitude of voltage conveniently and fast; and automatic transport can be realized after test, thereby greatly improving efficiency of withstand voltage test.