The invention discloses a PMFCL (permanent-magnet-biased fault current limiter) magnetic current thermal coupling modeling method. The PMFCL magnetic current thermal coupling modeling method includes establishing a 2D model of a half-wave current-limiting topological structure of the PMFCL; employing finite element software Ansoft to simulate the model; establishing a 3D model of the half-wave current-limiting topological structure of the PMFCL by the aid of the Ansoft; establishing a transient thermal analysis model in the ANSYS, subjecting the transient thermal analysis model to finite element mesh generation and subjecting a temperature field to graph mapping to the 3D model of the half-wave current-limiting topological structure of the PMFCL, and accordingly obtaining a temperature field calculation result of a PMFCL device at any moments. According to the arrangement, electromagnetic fields and current vectors of a winding and components of a linear PMFCL are analyzed and calculated with thermal fields to obtain magnetic-current-thermal coupling analysis, accordingly imparting a significant reference for material types and parameter designs of the PMFCL.