The utility model discloses a pressure test device for phase change energy storage material, include: be used for holding the sealed container of phase change energy storage material, can contact, beused for detecting the temperature sensor of phase change energy storage material temperature with the phase change energy storage material, stretch into inside the sealed container, be used for detecting the temperature variation in -process at the phase change energy storage material sealed container's internal pressure's pressure sensor, with temperature sensor with pressure sensor links to each other, is used for to acquire temperature sensor's temperature signal with pressure sensor's pressure signal's data collection station. The pressure size that a certain phase change energy storage material corresponds can be learnt to above -mentioned pressure test device in certain temperature section, for the structural strength design of phase change energy storage material packaging body provides theoretical support, can prevent effectively that phenomenons such as leaking, break from appearing in the phase change energy storage material in the packaging body, have very actual economic benefits.