Abstract: Disclosed is a method of robust unit scheduling for a transmission and distribution network based on a full frequency response process. The method includes: constructing full-process frequency security constraints for three stages of inertia response, primary frequency regulation, and secondary frequency regulation; establishing a two-stage robust unit commitment optimization model for the transmission and distribution network with a min-max-min structure that considers the full frequency response process, with objectives of minimizing start-stop costs, generation costs, and primary and secondary frequency regulation reserve costs; and transforming the two-stage robust unit commitment optimization model for the transmission and distribution network into a mixed-integer second-order cone programming model by using a column-and-constraint generation algorithm and a strong duality theory, followed by iterative solution.