The invention provides a temperature measuring device for lightning arrester tests. The temperature measuring device for lightning arrester tests includes a metal layer, a thermal insulation layer andan insulating layer, wherein the metal layer is used for connecting the impact current generated from a lightning arrester test system to the surface of a housing; the thermal insulation layer is used for isolating the high temperature environment generated from the test related with a lightning arrester from the outside of the housing; the insulating layer is used for isolating the high voltageenvironment in the test related with the lightning arrester from the outside of the housing; a measuring unit contacts all the resistance cards used in the test related with the lightning arrester foracquiring the real-time temperature signals of the resistance cards; and a processing unit is connected with the measuring unit for receiving the real-time temperature signals and converting the real-time temperature signals into real-time temperature data. The temperature measuring device for lightning arrester tests can effectively guarantee that the whole temperature measuring device is not damaged by the high temperature environment during the process of obtaining the temperature of the resistance cards so as to guarantee safe and effective operation of the whole temperature measuring device, by setting the thermal insulation layer between the metal layer and the insulating layer of the housing, and by isolating the high temperature environment generated from the test from the outsideof the housing through the thermal insulation layer.