Optical structure capable of increasing return loss and manufacturing method thereof

An optical structure capable of increasing return loss, comprising a light transmission body (1) and a plurality of juxtaposed optical fibers (2), wherein, a plurality of juxtaposed insertion holes (3) are disposed on the light transmission body (1), the plurality of optical fibers (2) are inserted into the insertion holes (3) one to one, an inclined end surface (20) inclined at a preset angle relative to a vertical surface is formed at a front end of the optical fibers (2), a reflection surface (10) aligned with the inclined end surfaces (20) is disposed inside the light transmission body (1), an avoiding opening (11) for accommodating an optical communication chip (4) is disposed at a front bottom of the light transmission body (1), a plurality of focusing lenses (12) in one-to-one correspondence with the optical fibers (2) are disposed on a top wall of the avoiding opening (11), the focusing lenses (12) are located below the reflection surface (10), an optical signal emitted from the front end of the optical fibers (2) is firstly reflected by the reflection surface (10) and then passed through the focusing lenses (12) into the optical communication chip (4).