The invention discloses a high-hardness cover of a shell of a lead storage battery, and relates to the technical field of battery processing production. The cover is characterized by being prepared from, by weight, 40-50 parts of polypropylene, 10-15 parts of modified nano calcium carbonate, 4-12 parts of mica powder, 2-7 parts of ethylene-bis-stearamide, 1-4 parts of p-tert-amylphenol, 9-14 partsof polyvinyl chloride resin, 1-4 parts of distearoyl isopropoxy aluminate, 2-7 parts of kieselguhr, 2-9 parts of chlorinated paraffin, 9-16 parts of auxiliaries, 12-20 parts of anti-ageing agent and35-42 parts of water. Accordingly, the method is reasonable, convenience is brought to operation, and abrasion resistance and toughness are good.