The invention provides an electromagnetic induction transparent effect-based all-dielectric polarization converter, and relates to a low-loss and ultra-thin all-dielectric polarization converter, which solves the problem that the application of a polarization device is limited as a result of the unfavorable integration of a photon system or the high loss of the polarization device made of metal materials caused by the thickness factor of an existing polarization device in the prior art. The all-dielectric polarization converter comprises four semicircular medium bricks, wherein the four semicircular medium bricks are oppositely arranged two by two. Every two oppositely arranged semicircular medium bricks are the same in radius. One ends of four medium lines are respectively connected with the rectangular side surfaces of the four semicircular medium bricks. The other ends of four medium lines are fixedly connected to be in the + shape. The four semicircular medium bricks and the four medium lines are arranged on the upper surface of a square substrate. The above device can be used as an all-dielectric polarization converter.