Aiming at the phenomenon that the beam quality of laser diode array could be deteriorated by the directivity deviation of emitters in the fast axis obviously,the influence of directivity deviation of emitters on beam quality in fast axis is studied.A method that the micro optic allows for the compensation of directivity deviation is put forward and the wedge shaped microlens array is designed.As a result,the laser beams of a single bar are coupled into a standard fiber with 200μmcore diameter and 0.2 numerical apertures (NA).The simulation results show that the beam parameters product of laser diode array is decreased from 64.24mm·mrad to 58.14mm·mrad in the fast axis,and the fiber coupling efficiency is up to 95.6%,which is improved by 10.4%.In order to reduce the process difficulty,the fiber coupling efficiency reaches 91.5% by using the classification compensation method.Considering the industrial application,the wedge lens group composed of three wedge shaped lenses is applied to compensate the beam directivity of the classified emitters respectively.The measured optical fiber coupling efficiency is 90.4%,which is improved by 7%.