The invention discloses a process for pressing diamonds into a rubber sheet frame. The process comprises the following steps: (1) cutting a rubber sheet and setting location holes; (2) engraving grooves and diamond sites; (3) engraving a transparent splicing material; (4) splicing materials by putting diamonds into diamond holes in the transparent splicing material, fastening the transparent splicing material and the rubber sheet by using chemical reagent liquid and successively carrying out heating and baking; (5) engraving a shape; (6) molding the splicing material through hot pressing; (7) engraving an inner ring; and (8) engraving an outer ring. The process provided by the invention utilizes the principles of expansion with heat and contraction with cold, heats the rubber sheet to allow the substance structure of the rubber sheet to expand and then allows substances of the materials to be fused into one integral body under the action of high pressure, so the substances has uniform density, deformation in a later stage does not appear, and splicing traces do not occur on the surface of the frame after completion of pressing; the diamonds can be pressed and embedded into a raw material at fixed positions; the process is simple and has good practicability; and the produced frame is more beautiful and durable.