The invention belongs to the technical field of display, and particularly relates to a high-barrier high-thermal-
conductivity packaging structure for flexible
OLED display and a preparation method thereof. The packaging structure provided by the invention comprises an inorganic
passivation layer and a composite buffer layer which are alternately stacked, wherein the composite buffer layer comprises a heat conduction silk screen layer and an
organic layer embedded in the heat conduction silk screen layer; and the heat conduction silk screen layer is exposed on the surface of the
organic layer and is attached to the inorganic
passivation layer. All
layers in the packaging structure of the structure are alternately stacked, so that the structure is excellent in barrier property for water andoxygen; the heat conduction silk screen layer improves the heat conduction rate of the packaging structure, the heat dissipation of the
OLED device is facilitated, the increasing of the degradation rate of the
OLED device material is avoided, and the service life of the OLED device is prolonged. According to the preparation method provided by the invention, the composite buffer
layers with different
layers are prepared at different temperatures, and the thickness of the composite buffer layer is larger than that of the inorganic
passivation layer, so that various functional materials of the OLED display layer are protected, and the compactness of the inorganic passivation layer is also improved.