The present invention discloses an OLED display panel, comprising a substrate; a photochromic layer, being formed on the substrate, and comprising photochromic material which changes from transparent to opaque under excitation of light; a transparent anode, formed at one side of the photochromic layer away from the substrate; an emission layer, formed at one side of the transparent anode away from the photochromic layer, and employed to emit light, and the light comprises a wavelength employed to excite the photochromic material; and a semitransparent cathode, formed at one side of the emission layer away from the transparent anode, and employed to pass a portion of the light and reflect the other portion of the light. The OLED display panel of the present invention has the longer micro cavity total optical distance. The present invention further discloses a manufacture method of an OLED display panel.