An easily dismantled escalator outer decking, the escalator including a handrail system bracket and a balustrade panel, the escalator outer decking including cover plate (1), wherein the escalator outer decking also includes a first bracket (3) mounted on the handrail system bracket (5), a retention member (2) secured to the cover plate (1) and an insertion strip (8), wherein the retention member (2) is connected to the first bracket (3) in a manner of embedding or snapping, and the insertion strip (8) is wedged between the cover plate (1) and the balustrade panel (9); such that when the outer decking is disassembled, the cover plate (1) and the retention member (2) can be taken down together by putting away the insertion strip (8) first and then lifting the cover plate (1) and the retention member (2) or pushing them towards the balustrade panel (9). The escalator outer decking the present invention has good configuration and can be dismantled easily during maintenance.