The invention provides a manufacturing method of a flexible display. A release layer is formed on a bearing substrate. The release layer is patterned to form a patterned release layer. A flexible substrate is formed on the patterned release layer. The flexible substrate covers the patterned release layer and a part of the flexible substrate contact with the bearing substrate. The adhesion force between the patterned release layer and the flexible substrate is larger than the adhesion force between the patterned release layer and the bearing force. A component layer is formed on the flexible substrate. A display layer is formed on the component layer. At the same time, the flexible substrate and the patterned release layer are cut. The cut patterned release layer separates with the bearing substrate. The separated patterned release layer is provided with the cut flexible substrate, the component layer and the display layer successively.