The invention discloses an AC/DC hybrid power distribution network robust planning method based on fault constraint, and the method comprises the steps: carrying out the clustering of the load of a planning region and the output of renewable energy sources based on a local density mean value clustering algorithm, and generating a plurality of typical operation scenes; Constructing a planning sub-model, a fault sub-model and an operation sub-model; Constructing an AC/DC power distribution network double-layer robust planning model based on the sub-models established in the step; And solving thedouble-layer robust programming model of the AC/DC power distribution network based on a C & CG algorithm. According to the invention, on the basis of minimizing planning and operation costs, it is guaranteed that the method is at any N <->; Under the fault condition of 1, the load shedding phenomenon is avoided, the wind abandoning, light abandoning and water abandoning phenomena are also avoided, and the economical efficiency is fully optimized on the basis of guaranteeing the safety of the system.