A novel method for laser array phasing is proposed. The active segmented mirror (ASM) is adopted to solve two key problems in the coherent beam combination of master oscillator power amplifiers (MOPA-CBC). The two key problems are the alignment of spatial beamlets and the phase modulation on system′s output end. The modulation principle of a seven-element ASM is introduced. Based on this device, the experimental verification of a seven-channel laser array is successfully accomplished. The spatial beamlets combination is implemented by a hexagonal pyramid. Two individual control loops are adopted to implement the piston and tip-tilt corrections. The precisions achieve lower than 25 μrad and λ/10. In close loop, the combined output laser with high quality has been obtained. The power fraction in main lobe achieves is 31.73%.