The invention belongs to the field of optical fiber technology, specifically a single-mode double-layer parallel optical fiber array, including an array substrate one, an array substrate two, a cover plate, a silica gel pad, a protective cover sheet, a splint, a small hinge, an optical fiber branch line, MT joints, V-shaped grooves, positioning right-angle grooves, rubber connecting columns, connecting blocks, positioning right-angle inserts, adhesive layers, silicone pressure sheets and glue positioning strips. In the present invention, a splint is arranged on the surface edge of the array substrate 1 and the array substrate 2, and the silica gel pad is bonded and connected, and the optical fiber branch connected to the optical fiber array is clamped and connected by the rotating splint, so as to realize the fixing effect on the optical fiber and avoid the loss of the optical fiber, and The exposed optical fiber branches on the first surface of the array substrate and the second surface of the array substrate are protected by the protective cover sheet and the silica gel pad to prevent the optical fiber branches from being affected by external factors.