The invention relates to an inlay structure of a jewelry back cover, which comprises a frame edge, wherein a mesh bottom plate is arranged on one side of the frame edge, and the bottom plate comprises a plurality of spacing strips with good reflectivity, and the spacing strips are interwoven into a mesh. These spacers have a certain width. When a thinner and smaller gem is installed on the mosaic structure of the jewelry back cover, the light is reflected on the gem through the partition of the bottom plate, so that the color is displayed and the ornamental effect of the jewelry is better.