The invention belongs to the high-voltage test field of electro-optical sensing elements and particularly discloses a temperature effect measurement device for electro-optical sensing elements. The device comprises an external high-voltage input and optical signal detection system, and an incubator and electro-optical sensing element experiment platform. The electro-optical sensing element experiment platform is positioned inside an incubator and is composed of a thermal-insulation cavity. The thermal-insulation cavity is provided with a threading hole. The incubator is correspondingly provided with test holes. An insulating sleeve is arranged between the threading hole and the test hole. A shockproof fixation layer is disposed at the bottom of the interior of the thermal-insulation cavity. The shockproof fixation layer is provided with a fixing mechanism for fixing electro-optical sensing elements. The cable of the external high-voltage input and optical signal detection system passes through a test hole, the insulating sleeve and another test hole to enter the thermal-insulation cavity. The device is extremely high in temperature precision and free from being influenced by the variation of the ambient temperature, thus meeting the requirements of various temperature-related electrical tests.