The embodiment of the invention provides a modeling and unlinking method of an AC/DC power grid containing an electromagnetic loop network, and relates to the technical field of DC transmission. An assistant decision can be provided for electromagnetic loop network unlinking operation and system safety and stability. The specific scheme comprises the steps of building an electromagnetic loop network AC system model by using an electromagnetic transient program; building a flexible DC transmission system model by using the electromagnetic transient program; integrating a flexible DC transmission system into an electromagnetic loop network AC system to replace an AC transmission channel on a low-voltage side of a sending end of the electromagnetic loop network; and adjusting power of the flexible DC transmission system during unlinking operation and taking an unlinking control scheme when transient and steady-state frequency constraints are met as a feasible control scheme. The modeling and unlinking method is used for determining the feasible control scheme during unlinking operation.