The present invention discloses a 10 kV lightning arrester test support comprising three support legs, a base, insulated posts and an installation disk. The support legs are arranged at the bottom of the base. The insulated posts are fixed on the base. The installation disk is fixedly arranged at the tops of the insulated posts. The installation disk is provided with installation holes for the plug-in installation of a lightning arrester. Each of the three support legs is rotatably connected onto the base. Each support leg comprises a supporting end and a connecting end, wherein the connecting end is rotatably connected with the base, and the horizontal height of the supporting end is lower than the height level of the connecting end. According to the technical scheme of the invention, the lightning arrester can be stably placed. Meanwhile, by means of the insulated posts, the lightning arrester is lifted to a certain height, so that the test condition is satisfied. The entire device is prevented from shaking during the testing process. At the same time, the supporting end of each support leg is lower than the connecting end of the support leg, so that an installation gap is reserved for the connecting end. During the landing process, only the supporting end of each support leg is grounded. Therefore, a stable placement platform is provided for the test on the lightning arrester, and the accuracy of test data is ensured.