The invention discloses a sole type calcium supplement instrument including a seat body, the upper surface of the seat body is provided with a support plate for supporting the feet of a human body, through light transmission small holes are arranged in the support plate, an ultra-violet lamp illumination device for generating a violet UVB band is arranged inside the seat body under the support plate, and the illumination direction of the ultra-violet lamp illumination device directs the light transmission small holes of the support plate. The ultra-violet lamp illumination device is arranged in the seat body for supporting the feet of the human body, when in use, the ultra-violet lamp is used to illuminate violet UVB band (wavelength being in the range of 275-320nm) to the soles of the human body, and the UVB ultra-violet rays have the effect of red spot on the human body, the calcium supplement effect can be achieved by enhancing the body mineral matter metabolism and vitamin D formation, and the skin tanning and sunburn can be prevented by means of irradiation of soles, so that the instrument is convenient to use and reliable.