The invention discloses a sealing test temperature rise testing method, and the sealing test temperature rise testing method includes the following steps that a plurality of micro temperature sensors are evenly arranged on the circumference of a tested sealing element through through-holes arranged on oil cavity end covers used for fastening the tested sealing element. The micro temperature sensors are fixed through bolts. The tested sealing element is carried out a temperature rise approximate test through the plurality of micro temperature sensors to acquire temperature rise information of the circumference of the sealing element. The sealing test temperature rise testing method achieves the analysis of the temperature rise uniformity of the circumference of the tested sealing element, and improves the accuracy of the temperature approximation test results of test specimen by a method that multipoint temperature sensing is used inside a front end cover and a back end cover of the oil cavity.