The invention relates to a resistance sheet crimping structure and a circuit breaker in the field of a high-voltage switch. The resistance sheet crimping structure comprises an insulation support, wherein the insulation support is used for installing resistance sheets which are arranged in a lamination way, an elastic piece and a pressure applying piece are arranged on the insulation support, the elastic piece is used for providing an elastic press force for the resistance sheets, the pressure applying piece is used for propping against the elastic piece and is movably arranged on the insulation support by a threaded transmission mechanism or is connected with a push piece in a transmission way so as to be movably arranged on the insulation support, and the push piece is connected onto the insulation support in a threaded transmission way. During application, the compression quantity of the elastic piece is changed by rotating the pressure applying piece or the push piece, so that the press force of the resistance sheets is further adjusted. Compared with an existing resistance sheet, other components are not needed to be disassembled during the adjustment process of the resistance sheet crimping structure on the resistance sheets, the resistance sheet crimping structure is convenient to operate and is relatively high in adjustment efficiency.