In order to improve the accuracy of the optical-fiber dimension transform element (OFDTE) which is used in spatial exploration, imaging system, iatrology and military reconnaissance, the plane arranging method of fiber array based on silicon V-grooves is established. Firstly, the system error of the OFDTE is analyzed. Then, experiments are performed on arranging fibers, solidifying glue, polishing end surface and packaging device. Finally, a 1×2 OFDTE containing 2000 optical fibers is fabricated. The measurement results indicate that the maximum error accumulated in 2000 periods of the silicon V-grooves is 0.5 μm, and the error of the height in Si-V grooves is less than 0.15 μm. The value of root mean square of roughness of the end face is less than 0.9 nm. Furthermore, the position error of the end surface in 2000 periods is 190.5 nm. The transmittance of the OFDTE without optical film is 51.46% at the wavelength of 632.8 nm. After random vibration experiment, the ratio of the broken fiber increases by 0.1%. The characteristics of device keep stable when environmental temperature is changed within -40 ℃ to 40 ℃.