The invention provides an intertripping prevention method for a power grid configured with distance-type backup protection. The method comprises the following steps: for the power grid configured withthe distance-type backup protection, and for an intertripping scene, giving an expression that measures the distance between an operation state of the power grid and the threshold; constructing an optimization model that maximizes the distance between the operation state of the power grid and the critical operation state, and takes the output power of a generator set of the power grid as the optimization variable; and for the optimization model, giving an optimized solution algorithm. According to the intertripping prevention method for the power grid configured with distance-type backup protection provided by the invention, an operation equation of the distance-type backup protection is combined, and the adjustment of the power of a power grid unit is used as a means, the prevention of the intertripping is achieved through the prevention method, thus the real scene of the intertripping of the power grid can be reflected more practically, and the prevention of the intertripping can beachieved while reducing the loss caused by a cutting machine and a load shedding device.