The invention relates to the technical field of lithium batteries, in particular to a battery with long cycle life and a manufacturing method thereof. In order to meet the demand of power batteries for long life, a single lithium-ion battery with long cycle life is developed. The battery system is lithium nickel cobalt manganese oxide and lithium titanate. The battery includes a positive plate, anegative plate, a diaphragm, electrolyte and a packaging film. A carbon-coated aluminum foil is coated with positive and negative electrode dressings; lamination is carried out with a high-porosity base film; packaging is carried out with an aluminum plastic packaging film, and long-life electrolyte is injected; and a battery with long cycle life is prepared by a high-temperature and high-pressureforming-aging process. The problem of short cycle life of lithium-ion batteries is solved.