NOVELTY - A prismatic type lithium secondary battery comprises polymer non-aqueous electrolyte, cathode and anode, both having active material capable of reversible lithium ion intercalation and deintercalation, and is obtained by performing polymeric non-aqueous electrolyte primary injection step, vacuum depressurization step (a), polymeric non-aqueous electrolyte secondary injection step, vacuum depressurization step (b), primary aging step, curing step, vacuum depressurization step (c), secondary aging step, initial charging step, and vacuum depressurization step (d).    USE - Prismatic type lithium secondary battery.    ADVANTAGE - Prismatic type lithium secondary battery has high capacity, safety, durability, intensity, and is manufactured without swelling phenomenon and separation of active material.    DETAILED DESCRIPTION - Prismatic type lithium secondary battery comprises polymer non-aqueous electrolyte, cathode, anode and casing for receiving and sealing the non-aqueous electrolyte. The cathode comprises cathode active material capable of reversible lithium ion intercalation and deintercalation and anode comprises anode active material capable of reversible lithium ion intercalation and deintercalation. The battery is obtained by performing polymeric non-aqueous electrolyte primary injection step, vacuum depressurization step (a), polymeric non-aqueous electrolyte secondary injection step, vacuum depressurization step (b), primary aging step, curing step, vacuum depressurization step (c), a secondary aging step, initial charging step, and vacuum depressurization step (d). The non-aqueous electrolyte is obtained by crosslinking and reacting hexyl acrylate monomer and lithium salt in presence of non-aqueous organic solvent such as ethylene glycol and diethylene glycol and initiator. Initiator is 2,2-azobis(2,4-dimethyl valeronitrile). The lithium salt is lithium hexafluoro phosphate, lithium tetrafluoro borate, lithium hexafluoro antimonite, lithium hexafluoro arsenate, lithium perchlorate, lithium trifluoro methane sulfonate, lithium tetra chloroaluminate, lithium chloride or lithium iodide, or lithium salts such as (LiN(SO2CF3)2, LiN(SO2C2F5)2, LiC(SO2CF3)3, LiN(SO3CF3)2, LiC4F9SO3 or LiAlO4). An INDEPENDENT CLAIM is included for manufacture of prismatic type lithium secondary battery.