The present disclosure provides a sealant curing device and a packaging method. The sealant curing device includes a bearing platform on which a display panel is placed, and a light conversion layer arranged on the bearing platform and configured to convert a light beam at a first wavelength into a light beam at a second wavelength. The light beam at the first wavelength is one of a UV light beam and an IR light beam, and the light beam at the second wavelength is the other one of the UV light beam and the IR light beam.