The invention discloses a color-film substrate and a display panel. The color-film substrate comprises a substrate body, a black matrix, a color resistance layer, a first protecting passivation layer or public electrode, an isolation column and an alignment film, wherein the black matrix and the color resistance layer are located on the substrate body; the first protecting passivation layer or public electrode is located on one sides, away from the substrate body, of the black matrix and the color resistance layer; the first protecting passivation layer or public electrode is provided with a plurality of first grooves, and the vertical projection, on the substrate body, of the first grooves is located in the vertical projection, on the substrate body, of the black matrix; the isolation column is located on one side, away from the substrate body, of the first protecting passivation layer or public electrode, and the vertical projection, on the substrate body, is located in the vertical projection, on the substrate body, of the black matrix; the alignment film is located on one side, away from the substrate body, of the first protecting passivation layer or public electrode or located on one side, away from the substrate body, of the isolation column. By the color-film substrate, the problem of display panel light leakage caused by alignment film accumulation is solved.