The invention relates to a high molecular material for an ammeter shell, which consists of PC-based resin, glass fiber, main flame retardant, dripping resistant agent, toughening agent, compatilizer, lubricant, and hindered phenol and phosphate ester of antioxidant. The high molecular material is characterized in that the PC is a mixture of two or more than two different PC with 5 to 24 of melt index, the main flame retardant is decabromodiphenylethane, the compatilizer is maleic anhydride grafting ABS, the toughening agent is PTW, and the lubricant is PETS and OP wax; and each component has the following adding weight portion: 490 to 770 portions of the PC-based resin, 100 to 300 portions of the glass fiber, 50 to 70 portions of the main flame retardant, 50 to 100 portions of the compatilizer, 20 to 40 portions of the toughening agent, 5 to 10 portions of the dripping resistant agent, 5 to 10 portions of the lubricant, and 4 to 6 portions of the antioxidant.