The invention belongs to the field of building structures, and particularly relates to a multi-piece movable roof water resisting and draining structure which comprises a high-side roof and a low-side roof, a main gutter and a standby gutter are arranged between the high-side roof and the low-side roof, the main gutter is fixed on the side face of the low-side roof, and the standby gutter is fixed on the side face of the high-side roof, connected to the bottom of the main gutter in a matched manner and exposed outside the main gutter. Overall appearance of a multi-piece movable roof when being closed is improved greatly, and improving of waterproofness and sealability of the movable roof is facilitated.