A method using the coupling technique of the high power laser diode array and micro \"lensed fiber array to achieve a very high output power is presented. Micro\"lensed fiber array was made of 19 fibers with the same diameter of the fiber core of 200 μm, and then the 19 fibers were fused to 19 micro\"lenses. The 19 micro\"lenses which had the same radius were fixed precisely by V\"grooves. For the design of micro\" lensed fiber array, the divergence of the laser beam from all directions was greatly reduced, and a very efficient laser beam shaper was achieved. Finally, high output power of 30 W of the coupled LDA was obtained, and the maximal coupling efficiency was more than 80% with the numeral aperture (NA) of 0.16.