The utility model relates to heath underwear capable of being used for measuring blood pressure, which comprises underwear, an inflatable air sac and a master controller for measuring blood pressure. The inflatable air sac is overlocked at a cuff of one side sleeve of the underwear and provided with an inflating hole, the inflating hole passes through shell fabric of the cuff to be exposed outside the underwear and provided with a detachable inflating cap, an inflating needle is protrudingly arranged on one face of the master controller for measuring blood pressure, and the inflating needle matched with the inflating hole at the cuff is used for being connected with an air pressure sensor of the master controller for measuring blood pressure. The heath underwear has the function of blood pressure measurement based on common underwear, and perfectly integrates wearing and health caring, a wearer can simply and quickly measure blood pressure anytime and anywhere, and the heath underwear has the advantages that measurement is accurate, measurement results can be reported audibly, normality of blood pressure is determined automatically, measurement data can be displayed through a liquid crystal display, and the underwear is low in power consumption, long in service life, safe, simple and convenient, comfortable to wear, and repeatedly washable.