An OLED display panel, an OLED display device, and an OLED component packaging method. The OLED display panel comprises: a first substrate (1); a second substrate (6) disposed opposite to the first substrate (1); and a heat-conducting layer (2), a first packaging adhesive (3), a second packaging adhesive (4), and an OLED component (7) that are located between the first substrate (1) and the second substrate (6). The first packaging adhesive (3) is located between the first substrate (1) and the second substrate (6) and forms a sealed space with the first substrate (1) and the second substrate (6). The heat-conducting layer (2) is formed in an area encircled by the first packaging adhesive (3) and comprises at least two areas (21, 22) with different heat-conducting properties. At least the heat-conducting property of the marginal area of the heat-conducting layer (2) is better than the heat-conducting property of the central area. The second packaging adhesive (4) is filled in the sealed space formed by the first substrate (1), the second substrate (6), and the first packaging adhesive (3) and makes contact with the surface of the heat-conducting layer (2). By means of the heat-conducting layer, the second packaging adhesive in contact with the heat-conducting layer is allowed to generate a temperature difference at the central area and the marginal area, and furthermore, the diffusing speed of the second packaging adhesive from the center to the periphery is controlled, thereby preventing the second packaging adhesive from causing damage to the first packaging adhesive, guaranteeing the water-blocking and oxygen-blocking performance of the first packaging adhesive, and prolonging the service life of the OLED component.
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