The invention discloses an interruptible load participation rotation standby coordination optimization method considering a frequency recovery effect and belongs to the electric power system safety planning operation field. In the method, a fault generation probability and an active power vacancy size are calculated; a rotation standby capacity size provided by each generator set and a difference coefficient, a rotation standby capacity size provided by each interruptible load and a frequency adjusting coefficient and a system frequency recovery effect requirement constraint are considered; and minimum cost is taken as an objective function so as to construct an interruptible load participation rotation standby coordination optimization model. In the method of the invention, a frequency recovery and actual power vacancy fault generation probability is integrally considered and an optimization result can be used as a decision reference for operation personnel to make a power grid power generation plan and a mode.