Abstract: This paper proposes the novel concept of coherent beam combining using stimulated annealing algorithm. Numerical simulation on coherent beam combining of multiple fiber amplifiers is carried out; the dependence of convergence rate on laser numbers is analyzed. Coherent beam combining of two watt-level fiber amplifiers is experimentally achieved. Experimental result shows that the whole system in close-loop performs well for long-time observation. The average energy encircled in the target pinhole is 1.8 times higher than that in the case of open-loop. The probability of energy encircled in the main-lobe to be more than 80% of its ideal value is increased from 19.4% to 51.3% when the system evolves from open-loop to close-loop.