The invention provides a display panel and a driving method thereof and belongs to the technical field of electronic ink display. The problems that electric fields in an existing electronic ink type display panel are not uniform, and the electrode preparation difficulty is high can be at least partially solved. The display panel comprises a first substrate and a second substrate which are arranged in a cassette-to-cassette mode. A transparent medium is arranged between the first substrate and the second substrate, and charged light absorption particles are mixed in the transparent medium. The first substrate comprises a first base and total reflection structures, and the refractive index of the transparent medium is lower than that of the light absorption particles and the total reflection structures. Multiple electrode walls are arranged in each pixel unit of the display panel. The electrode walls in each pixel unit comprise the first electrode walls and the second electrode walls. The wall face of each first electrode wall is opposite to the wall face of at least one second electrode wall in the direction parallel to the display panel. The wall face of each second electrode wall is opposite to the wall face of at least one first electrode wall, and the total reflection structures are arranged between the opposite electrode walls.