The utility model discloses a Rogowski coil, which comprises a framework and a coil substrate formed by a conducting wire wound on the framework, and a conducting wire leading-out end formed the end part of the conducting wire extending out of the coil substrate, wherein an epoxy resin layer is wrapped on the coil substrate. The epoxy resin layer arranged on the Rogowski coil enhances the mechanical strength of the whole Rogowski coil, fix and protect the conducting wire wound on the framework, prevents the Rogowski coil from being deformed as pressed by external force, ensures the measuring precision and the long service life of the Rogowski coil.