The invention discloses a high-stability charger shell which comprises, by weight, 40-80 parts of polyurethane resin, 40-60 parts of acrylonitrile-butadiene-styrene plastics, 2-4 parts of plasticizers, 0.1-0.8 part of trioctyl phosphite, 0.4-1 part of di (3, 5-di-tert-butyl-4-hydroxy benzyl) sulfur ether, 0.1-0.4 part of antistatic agents, 1-2 parts of salicylic acid rare earth complexes, 0.5-1.2parts of calcium stearate, 0.2-0.8 part of montmorillonite, 15-25 parts of filling reinforcing agents, 1-2 parts of aluminum-zirconium coupling agents and 2-6 parts of modified xanthan gum. The modified xanthan gum is prepared by the following process: dissolving the xanthan gum in water; adding and stirring acrylamide and trimethylolpropane triglycidyl ether; filling mixture with nitrogen until saturation; adding potassium persulfate; increasing temperature and performing stirring; adding ethanol solution; filtering precipitates and washing and drying the mixture to obtain the modified xanthan gum. The high-stability charger shell is good in heat-conducting property and high in heat conducting coefficient and has excellent mechanical properties and excellent toughness.