Positive pole piece, lithium secondary battery, preparation method of lithium secondary battery and power utilization device

The invention provides a positive pole piece, a lithium secondary battery, a preparation method of the lithium secondary battery and an electric device. The positive pole piece comprises a positive current collector and a positive film layer formed on the positive current collector, the positive electrode film layer sequentially comprises a lower region and an upper region in the direction far away from the positive electrode current collector, the lower region and the upper region both comprise a positive electrode active material and a lithium supplement agent, and the lithium supplement agent in the lower region accounts for 0-7% of the total mass of the lithium supplement agent in the positive electrode film layer; and/or the lithium supplement agent in the upper region accounts for 93%-100% of the total mass of the lithium supplement agent in the positive electrode film layer. The positive pole piece provided by the invention is used in the lithium secondary battery, so that the improved safety performan