The invention discloses a method for testing the static friction coefficient of a material in high-temperature and high-pressure water environment, and provides a test method for measuring the static friction coefficient of a material in high-temperature and high-pressure special service environment. The method comprises the following steps: measuring the load-displacement/time relationship curve under and without compacting force applied between friction pairs, ingeniously using the direct proportion of the compression force of a spring to the compression amount to realize decomposition of two physical processes of kinetic friction between sealing members and static friction between the friction pairs, and solving to obtain a friction force-displacement/time relation curve in order to conveniently obtain the static friction coefficient of the material in the high-temperature and high-pressure water environment. The method can realize measurement of the static friction coefficient of the material in the high-temperature and high-pressure closed environment only through using a routine test device without a high-temperature and high-pressure environment load sensor and a displacement sensor, and the method also has the advantages of simplicity, low cost, conservative and reliable result, and large application values in engineering design or assessment.