The utility model relates to a miniaturized large capacity voltage resistance device for GIS is experimental is connected with external power supply with by experimental GIS equipment respectively for realize the withstand voltage test of GIS equipment, the device including the moving as a whole chassis with set up reactance module, the electric capacity module on the moving as a whole chassis and keep apart the impedance module, reactance module, electric capacity module and isolation impedance module are the metal -enclosed module by SF6 gas -insulated, and common the connection forms series resonance boost circuit, the input and the external power supply of reactance module are connected, and the output is connected with the input of keeping apart the impedance module, it is connected with electric capacity module and underproof GIS equipment respectively to keep apart the output of impedance module. Compared with the prior art, the utility model has the advantages of capacious, miniaturized, have a pulse current method measurement of partial discharge function and portable.