The invention discloses a foot tub treating hypertension. The foot tub comprises a double-layer tub body, a bottom plate, a massage mechanism, a medicine storage mechanism, a cover body and an outer tub body. The double-layer tub body is provided with a plurality of first air vents. An air storage tank is arranged in an interlayer. The first air vents are in pipeline connection with the air storage tank. The bottom plate is fastened to the bottom of the tub body. The middle of the tub body is provided with first holes corresponding to foot arches. A plurality of second holes are evenly distributed around the first holes. The massage mechanism comprises a panel, a telescopic rod, gypsum rolling wheels, a massage ball and a rotary shaft. Magnetic balls are inlaid in the gypsum rolling wheels. The medicine storage mechanism comprises a medicine box and a traditional Chinese medicine bag for specially-made traditional Chinese medicine composition. The outer tub body is provided with a steam generator and a driving mechanism. The foot tub is convenient and safe to use, through massage of the gypsum rolling wheels under feet, a good treatment effect can be achieved on hypertension, a traditional Chinese medicine prescription specific to hypertension is placed in the foot tub, thus the liver is soothed, vital energy is regulated, the spleen is nourished, dampness is removed, blood is nourished, vital energy is smoothened, the constitution of a patient is regulated fundamentally, and the hypertension is treated.