The invention provides a manufacturing method of a
flexible display device. In the manufacturing method, a water and
oxygen barrier layer is directly arranged on a flexible
polymer substrate, and then arranged on an organic light-emitting
diode in a bonding manner, so that the film-forming compactness of the inorganic
barrier layer can be improved, and accordingly the
water vapor and
oxygen permeation preventing capability of the water and
oxygen barrier layer is improved, degradation and deterioration of various materials in the organic light-emitting
diode are prevented and the service life of the
flexible display device is prolonged; the manufacturing process of the organic light-emitting
diode and the manufacturing process of the water and
oxygen barrier layer are not required to be sequentially carried out, the water and
oxygen barrier layers on a first flexible
polymer substrate and a second flexible
polymer substrate can be manufactured synchronously or manufactured on the same flexible
polymer substrate, and a
cutting process is performed as required, so that a production process can be simplified and purposes of improving the production efficiency and reducing the cost are achieved. The invention further provides the
flexible display device manufactured by the manufacturing method. The flexible
display device is relatively long in service life.