Positive plate, preparation method thereof and lithium ion battery

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a positive plate and a preparation method thereof and a lithium ion battery, the positive plate comprises a positive current collector, one side surface of the positive current collector is provided with a first coating area and an empty foil area, the first coating area and the empty foil area are arranged in parallel, and the other side surface of the positive current collector is provided with a second coating area; the safety coating is arranged in the first coating area and the second coating area, and the resistance ranges from 0.13 ohm to 3 ohm; the insulating layer is arranged in the empty foil area; and the positive electrode active layer is arranged on the outer surface of the safety coating. According to the positive plate, the safety coatings are arranged on the surfaces of the two sides of the positive current collector, so that the bonding force between the positive current collector and the positi