The invention provides a GIS combined electric appliance intelligent component performance detection device. A GIS combined electric appliance intelligent component comprises a measured partial discharge state monitoring IED and a measured SF6 gas state monitoring IED. The detection device comprises a GIS combined electric appliance body, a partial discharge detector which is connected at one end of the GIS combined electric appliance body, a voltage generation device which is butted with the other end of the GIS combined electric appliance body, and a partial discharge state monitoring IED detection gas chamber and a SF6 gas state monitoring IED detection gas chamber which are perpendicularly fixed on the external wall of the GIS combined electric appliance body and coaxially and axially perpendicular to the axis of the GIS combined electric appliance body. The measured partial discharge state monitoring IED and the measured SF6 gas state monitoring IED are respectively connected on the partial discharge state monitoring IED detection gas chamber and the SF6 gas state monitoring IED detection gas chamber. According to the technical scheme, the controllable state simulation technology is adopted so that the reproduction mode is simple, the level of automation is high, and the performance detection efficiency of the GIS combined electric appliance intelligent component can be enhanced.