The invention discloses a driving method for adjusting automatic discharge time of a plasma display. The energy recovery rise time of various maintenance waveforms in all sub fields is dynamically adjusted according to the magnitude of sub field load, so that the energy recovery can be automatically adjusted. The driving method has the advantages that due to the improved driving method, the energy recovery rise time of various maintenance waveforms in all the sub fields is automatically and dynamically adjusted according to the magnitude of the sub field load, and the discharge of a plasma display screen in a maintenance period is improved; and when the sub field load is small, the energy recovery action time is automatically increased, the utilization rate of energy recovery circuits is improved, the power consumption of the circuits is reduced, and the luminous efficiency of the plasma display screen is improved.