In order to expend the application of the laser diode linear array in the far field, the collimation system is required. A collimation system is designed by vertical double half micro-cylindrical lens combination array. Ray-tracing method is used to analyze the transmission equation of the laser beam and the divergence angle changing with some parameters of the lens is analyzed to get the optimization design. Then, the shaded model picture and the detector viewer are simulated in non-sequential tracing by Zemax-EE, and the laser spot is gotten which is close to rectangle. The incoherent irradiance concentrates in the center-weighted area, and the divergence angle of the beam after the collimation system is about 3 mrad. The collimation system can collimate the diverse angle of two directions simultaneously, and the fabrication and installation is easy.