Abstract: To simplify the controller design for a Boost convertor,and to reduce the effect of the nonlinearity of its transfer function,an artificial bee colony algorithm was used to optimize the controller parameters.The convergence speed of the algorithm can be accelerated by adjusting the target function,the colony and the iteration number.The optimized controller can be adaptive to the nonlinearity and the load regulation.The simulation results show that, compared to the classical design methods,the controller optimized by artificial bee colony algorithm can eliminate the overshoot caused by the step signal,and decrease the regulation time by 80 percent.It also reduces the regulation time by 50 percent when the load doubles.