Horizontal wet process method for flexible substrate

The invention provides a horizontal wet process method for a flexible substrate, which is applied to wet process equipment. The method comprises the steps of fixing a flexible planar substrate by using a jig capable of manufacturing an arc surface, and enabling the flexible planar substrate to form an arc-shaped flexible substrate; and placing the arc-shaped flexible substrate and the jig capable of manufacturing an arc surface on a conveying device, enabling the arc-shaped flexible substrate and the jig capable of manufacturing the arc surface to operate in a working area for spraying liquid in a horizontal mode, spraying liquid medicine to the arc-shaped flexible substrate by a liquid spraying device, and enabling the liquid medicine to drag towards a first side edge and a second side edge from a central arc surface part of the arc-shaped flexible substrate under the action of gravity, so that contact between the flexible substrate and the conveying device or an operation device is reduced in the wet proces