The utility model provides a laboratory test device for a high-voltage electric field environment. The device comprises a disc-shaped upper polar plate and a disc-shaped lower polar plate which are the same in shape and size, the disc edges of the upper polar plate and the lower polar plate are respectively provided with a grading ring; the bottoms of the upper polar plate and the lower polar plate are parallel and opposite to each other; the upper polar plate is connected with a high-voltage test transformer; the lower polar plate is grounded. The device is simple to manufacture and low in cost, conventional components which can be contacted in an electric power test are fully utilized, the design purpose is achieved, the device has excellent performance, and uniform electric field distribution and a suitable test platform are provided. According to the embodiment, an electric field which is uniform enough is generated between the upper polar plate and the lower polar plate, and the electric field intensity can be flexibly adjusted by controlling the distance between the upper polar plate and the lower polar plate; and the chassis of the lower polar plate is used as a test platform, so that a wide enough operation space is provided, and various test operations can be performed easily.