The invention belongs to the technical field of jewelry mosaic, and particularly relates to a process for fixing by using metal and applied to jewelry mosaic. In view of the problems of the mosaic ofan existing process, a tool is difficult to complete changes of angles, and the mosaic angle and the aesthetic property are not good. The process comprises the following steps that (1), jewelry designing is carried out, specifically, according to a desired mosaic effect, a designer draws on drawings to obtain a mosaic model in an approximate shape; (2), metalbracket forming is carried out, specifically, according to the drawings of the step (1), a metal bracket structure in an inner concave metal shape is produced by using a 3D printer or in a completely manual mode; and (3), positioning is carried out, specifically, a metal bracket inlay opening obtained by the step (1) is ground into a concave groove with a tooth needle, the concave groove is used for placing a diamond, and then a notchis ground at a claw position with an umbrella needle according to the different heights of the diamond in order to fix the diamond. The process for fixing by using the metal and applied to the jewelrymosaic can realize an effect of replacing the diamond with the metal, the cost of the mosaic is reduced and the aesthetic property of the mosaic is improved, and wide popularization and application are facilitated.