The invention discloses a method for manufacturing an optical fiber confocal etalon. The method is characterized by comprising: step 1, penetrating an optical fiber into a capillary tube, wherein the end face of the optical fiber is lowered than the end face of the capillary tube to form the height h; step 2, filling a glue solution into a miniature groove formed by the capillary tube and the end face of the optical fiber; step 3, soaking the glue solution and the capillary tube and forming a miniature concave face on the surface through tension effect; or enabling the glue solution and the capillary tube not to be soaked, forming a miniature spherical surface through the tension effect and then curing glue solution to obtain cured concave surface lenses or cured spherical surface lenses; step 4, oppositely combining two cured concave surface lenses or miniature cured spherical surface lenses to form a double-concave-surface-cavity optical fiber confocal etalon, or combining one concave surface lens or miniature spherical surface lens and one plane reflecting mirror to form a flat-concave-cavity optical fiber confocal etalon. The optical fiber confocal etalon manufactured by means of the technical scheme has the advantages of being simple in process, controllable in spherical surface and the like and suitable for wide popularization.