The invention provides a reactive power control method for voltage of a power distribution network of considering a demand side response. The method comprises the steps of obtaining voltage information of various load nodes by using a voltage transformer at the tail end of a feeder of the power distribution network, selecting a voltage minimum Vend of one load node from the voltage information andcalculating a voltage drop VD between rated voltage V0 of the head end of the feeder and the voltage minimum Vend of the load node; setting voltage drop limits VDh and two voltage bandwidths, as shown in the specification, of each load node at different voltage levels and determining the ranges of corresponding expected voltage bandwidths Vbw of each load node; and adjusting the quantity of tapsof a stepped voltage regulator. The reactive power control method for the voltage of the power distribution network of considering the demand side response has the beneficial effects that (1) the method is simple, feasible, scientific and reasonable; and (2) reactive power vacancy of various nodes is compensated through adjusting the voltage of the load nodes, so that the operation stability of asystem is improved, the energy consumption of the system is reduced and energy-saving and stable operation of the power distribution network is promoted.