The invention relates to the technical field of automobile manufacturing and discloses a windscreen wiper cover plate assembly which comprises a windscreen wiper cover plate body and a windscreen wiper cover plate decoration block. Clamping hooks are arranged on the windscreen wiper cover plate decoration block, the windscreen wiper cover plate body and a pillar A are both provided with a mounting hole used for being connected with the clamping hooks on the windscreen wiper cover plate decoration block in a clamping mode, one end of the windscreen wiper cover plate decoration block is connected with the windscreen wiper cover plate body in a clamped mode, and the other end of the windscreen wiper cover plate decoration block is connected with the pillar A in a clamped mode. The windscreen wiper cover plate assembly can solve the problems that a lap-joint gap and flushness of the windscreen wiper cover plate decoration block and the windscreen wiper cover plate body are large, lap joint of the windscreen wiper cover plate decoration block, the pillar A and a windscreen is bad, natural and attractive transition of peripheral pieces is affected, and the windscreen wiper cover plate decoration block is not convenient to mount and dismount.