The invention relates to a protection device of a displaying module driver, comprising a protective cover. The protective cover leads the driver to be located between the backboard of the displaying module and the protective cover; the protective cover comprises a top surface and a plurality of sides extending downwards; wherein, a first side is provided with a plurality of tongue-shaped blockingstructures which extends outwards and are parallel to the top end of the protective cover at intervals, the front part of the tongue-shaped blocking structures is provided with a projection; the backboard is provided with a plurality of prorupt fixing device at intervals, the top end of which is provided with a through hole that can be blocked with the projection at the front part of the tongue-shaped blocking structure correspondingly; the second side of the protective cover is provided with a first locking part at intervals; the backboard is provided with a second locking part at intervals,and the second locking part is buckled with the first locking part correspondingly.