The invention relates to a multifunctional health protection device for udders of cows. The device comprises a brassiere, which is provided at its lower portion with circular openings (5) corresponding to four teats of a cow. The four circular opening (5) are equipped with teat cups (8). There is a hole at the fore end of each teat cup (8). The brassiere is formed by the inner and outer hoods (1, 2). An electrical heater (4) is mounted between the inner and outer hoods (1,2). Permanent magnets, which are winded with coils, are arranged around the outer wall of the inner hood and the circular openings. An electrical vibrator (6) may be provided at the centers of the four circular openings between the inner and outer hoods. A plurality of conductive rubber electrode (7) is mounted on the inner wall of the inner hood. A removable cup (9) for containing sterilizing agent is installed in the brassiere (8). A ring seal (11) with a central hole is provided at the upper part of the removable cup. The device of the invention can implement milking, keeping constant temperature, heating therapy and vibrating massage to cows and has the functions of dredging meridian, harmonizing the flow of Qi and blood, activating blood and resolving stasis, preventing and curing mastitis of cows, enhancing the ability of lactating to increase the milk production of cows and the like.