Laser pulse shape is one of the most critical parameters for the success of inertial confinement fusion experiments. The ability to shape the laser pulse with accuracy, efficiency, and robustness is fundamental for high-power laser facility with individual characteristics and independent adjustability for each beam. An autonomous pulse-shaping method is established by employing an iterative algorithm and some strategies, solving the problem of nonlinear response in the pulse-shaping process, as well as improving the convergence rate. The test results indicate that it is capable of shaping an almost arbitrary pulse waveform at the accuracy of better than 10% (rms) of the deviances within 20 iterations or about 10 min, even a 23∶1 high-contrast-pulse waveform can be done with high quality of pulse and measure condition. With this method, the precise control on the laser pulse shape and the operational efficiency can fully meet the experimental requirements.