The invention discloses a method for separating waste material cut from positive and negative electrode ears of a lithium battery cell and relates to the technical field of lithium battery material recovering, the method includes steps of pulverizing, frictional dispersing and specific gravity separation, pulverizing positive and negative electrode lug mixture into metal debris, manufacturing metal particles by a frictional dispersing mechanism, and separating aluminum particles, copper particles and nickel particles from metal particles by a specific gravity separator. According to the invention, the number of devices is small and the separation efficiency is over 99%. A large-scale treatment on waste material cut from positive and negative electrode ears of a lithium battery cell can bequickly realized.