At present,belt conveyors in bulk terminal move at constant speed in a variety of operating conditions,which causes serious waste of power energy.In view of the above-mentioned facts，intelligent variable frequency speed regulation algorithm is studied to achieve that the belt conveyors regulate their speed intelligently according to the material flow.And the problems of low efficiency and high unit energy consumption of belt conveyors caused by uneven distribution of material flow,long time no-load and low load operation were solved.It has been verified by practical applications that this algorithm has remarkable effect on energy saving.