With the large.scale development of electric bus,the bus which replaces its battery can be used as a kind of demandresponse resource and reduce the negative impact of large electricbus charging load.A sequential model of bus status switching isbuilt, taking a day as a cycle, the time distribution and the numberof demand of swapping batteries for electric buses is obtained.Anexpression for calculating the adjustable interval of the battery charg.ing plan is established, and in this section, a charging optimal modelaimed at minimizing the peak.valley difference of system load is es.tablished, which would be solved by Monte Carlo.A case study ofelectrification of an actual bus line is carried out.The results show that the proposed model can play a role in shifting peaks.The influ.ence of departure time and battery configuration on the regulationpotential of bus load control is analyzed.