A milk frothing device comprises a lid assembly (1), a stirrer assembly (2) and a cup body assembly (3). The stirrer assembly (2) comprises a stirrer handle (2.1), a cantilever (2.3), a baffle frame (2.4), and a stirrer (2.5). The cup body assembly comprises a cup (3.6), a cup bushing (3.7) which surrounds the cup (3.6), a driving magnet (3.1) which is opposite to a stirrer magnet (2.6) of the stirrer (2.5) and a diving motor (3.3) which drives the driving magnet (3.1). The stirrer handle (2.1 ) is connected to the baffle frame (2.4) by the cantilever (2.3). The stirrer handle (2.1) is positioned on the cup bushing (3.7). The stirrer (2.5) comprises the stirrer magnet (2.6) to be driven by the driving magnet (3.1) of the cup body assembly (3). The stirrer assembly (2) is positioned automatically by the magnetic effect between the stirrer magnet (2.6) and the driving magnet (3.1).
