An optical fingerprint recognition system, for recognizing a fingerprint pattern of a finger, comprising: a finger board, having a first plate face and a second plate face, wherein the first plate face is opposite to the second plate face, the first plate face is used for being contacted by the finger thereon, and the second plate face has a plurality of micro-structures disposed thereon, wherein the micro-structures are of an arc-shaped cone structure formed by a first arc-shaped convex surface and a second arc-shaped convex surface; an image capturing element, separated from the finger board for a distance and corresponding to the second plate face, wherein the image capturing element is used for capturing the fingerprint pattern of the finger; at least one light emitting element, separated from the finger board for a distance and corresponding to the second plate face, wherein the light emitting element emits at least one light ray towards the finger board; an optical element disposed between the finger board and the image capturing element; and at least two light guide elements, wherein the two light guide elements are disposed on two opposite sides of the optical element respectively, the finger board is disposed at one side edge of the two light guide elements, and the finger board, the optical element, element, and the light guide elements surround and define a cavity, and the light ray is provided to the cavity by the optical element and the light guide elements elements to form an uniform light field, wherein the optical element and the two light guide elements elements are integrally formed, the two light guide elements each have a guide chamfer connected to the optical element respectively, and the two light guide elements cover outer edges of the at least one light emitting element; wherein the micro-structures are used for guiding the light ray uniformly distributed in the finger board, such that the light ray is reflected to the image capturing element by the finger, and the image capturing element captures the light ray applied on the finger, so as to recognize the fingerprint pattern of the finger. a finger board, having a first plate face and a second plate face, wherein the first plate face is opposite to the second plate face, the first plate face is used for being contacted by the finger thereon, and the second plate face has a plurality of micro-structures disposed thereon, wherein the micro-structures are of an arc-shaped cone structure formed by a first arc-shaped convex surface and a second arc-shaped convex surface; an image capturing element, separated from the finger board for a distance and corresponding to the second plate face, wherein the image capturing element is used for capturing the fingerprint pattern of the finger; at least one light emitting element, separated from the finger board for a distance and corresponding to the second plate face, wherein the light emitting element emits at least one light ray towards the finger board; an optical element disposed between the finger board and the image capturing element; and at least two light guide elements, wherein the two light guide elements are disposed on two opposite sides of the optical element respectively, the finger board is disposed at one side edge of the two light guide elements, and the finger board, the optical element, element, and the light guide elements surround and define a cavity, and the light ray is provided to the cavity by the optical element and the light guide elements elements to form an uniform light field, wherein the optical element and the two light guide elements elements are integrally formed, the two light guide elements each have a guide chamfer connected to the optical element respectively, and the two light guide elements cover outer edges of the at least one light emitting element; wherein the micro-structures are used for guiding the light ray uniformly distributed in the finger board, such that the light ray is reflected to the image capturing element by the finger, and the image capturing element captures the light ray applied on the finger, so as to recognize the fingerprint pattern of the finger.