The utility model relates to a stress ring for partial discharge tests and high-voltage insulation tests on a 35kV or lower power cable, which is characterized in that three screws on the stress ring enable the stress ring to be fixed to a cable shielding layer; the stress ring is a hollow cylindrical body with the outer diameter being 20-110mm, the height of the stress ring is 30-220mm, and an outer opening of the lower end of the stress ring is a semicircle with the radius R being 0.8-6.0mm. A test terminal is enabled to be installed conveniently and rapidly, material consumption is low, and the stress ring is durable in use. The field intensity of end parts of the 35kV or lower crosslinked polyethylene power cable or other 35kV or lower shielded power cables is centralized under the action of high voltage (with the highest reaching 91kV), and end breakdown easily occurs; and especially, discharge easily occurs between an insulator of a cable core of the crosslinked polyethylene power cable and an outer shield of the power cable, thereby influencing the tests or flashover or breakdown or the like.