The present invention provides an array substrate structure and a manufacturing method thereof, in which after a common electrode (91) is formed, a reduction resistant layer (82) is first formed on the common electrode (91) before deposition of a second insulation layer (83) in order to prevent the film quality of the common electrode (91) from being affected by a reductive atmosphere generated in a process of directly depositing the second insulation layer (83) on the common electrode (91) thereby reducing the influence on the transmittal of the common electrode (91) caused by the deposition of the second insulation layer (83) on the common electrode (91) and providing the common electrode (91) with increased transmittal and enhancing displaying performance.