A steam physiotherapy apparatus includes an open-topped physiotherapy chamber having a door, a steam generating unit, and a steam pipe for conveying generated steam into the physiotherapy chamber. Tourmaline tiles are attached to an inner surface of the physiotherapy chamber, a steam inlet pipe is provided on a bottom of the physiotherapy chamber to communicate with the steam pipe, and a steam flow guide plate is placed on the steam inlet pipe. The steam inlet pipe has two diametrically opposite steam outlets directed to two opposite directions, such that the steam flowing out of the two steam outlets forms a swirl that moves upward along the inner surface of the physiotherapy chamber to heat the tourmaline tiles. The heated tourmaline tiles release far infrared rays and negative ions that help reducing reactive oxygen species and free radicals in the user's body and help the user to give off deep-layer sweat.