The invention discloses an auxiliary tool for independent temperature rise test of solid-sealed polar poles, comprising support rods screwed in screw holes of a solid-sealed polar post mounting base;an adjuster is connected to a connection rod of an insulating tie rod of a sold-sealed polar post; the adjuster moves axially along the connection rod. The auxiliary tool also includes a fixing plate;the fixing plate is provided with holes corresponding to the support rods and the connection rod, and the support rods and the connection rod are nested in the fixing plate; the end, far away from the solid-sealed polar post, of each support rod is provided with a limiter; the adjuster is positioned at the end close to the insulating tie rod. The auxiliary tool may replace a vacuum breaker to apply required rated overtravel to a solid-sealed polar post during temperature rise test, so that rated pressure is applied to a contact of the solid-sealed polar post. The auxiliary tool allows temperature rise test verification to be performed independently with no need for mounting a solid-sealed polar post on a vacuum breaker. The auxiliary tool saves cost, is simple and easy to operate, and allows the temperature rise verification process of the development process of solid-sealed polar posts to be shortened.