The fiber coupling is an important method of semiconductor laser integration for improving light beam quality and remote communication. But due to the limits of semiconductor laser volume and thermal dissipation, the output light after integration of laser has still larger beam parameter product (BPP), which is not easy to couple with a single multimode fiber. The packing ratio of fiber bundle is another factor to limit direct couple with fiber bundle. In order to get high efficiency couple integration light source of multi semiconductor laser into fiber bundle, optical amplify system is adopted to compress the beam diameter. Microlens array is used as coupling element, which makes the pupil of lenslet image on the end of fibers. One- to- one coupling is achieved and a fiber coupling system with no loss in theory is come ture. To improve aberration effect due to rim ray, hollow light pipe is employed to further homogenize light field. Furthermore, divergence angle of rim ray is reduced and its imaging quality is improved. The coupling efficiency of optimized system can be up to 98%. The system utilizes microlens array for beam splitting and imaging, which overcome the shortages of larger BPP and not easy to couple with single fiber. The system makes the pupil of microlens to image at the end of fibers and gets the same arrange spots image with that of the fiber bundle, thus, coupling efficiency of both light beam and fibers are improved.