Uniform illumination is an important condition for maintaining high uniformization consistence of lithography lines in projection lithography. Micro-lens array used as the illumination uniformization component can make the rectangular illumination spot as well as acquire high far field uniformization. Based on modern processing technology, the cylindrical micro-lens array divided in two-dimension is designed, and the central bright line in the far field created by the transition area between the micro-lens array is eliminated. Simulation results show that the far field non-uniformi of the designed micro-lens array reaches 0.85%.