Staircase interlayer water stop device

The utility model relates to a staircase interlayer water stop device, which comprises a Z-shaped water baffle, a roof drain and a drain pipe, the Z-shaped water baffle comprises an upper inclined panel, a vertical panel and a lower inclined panel, and the upper inclined panel and the lower inclined panel are respectively and flexibly connected with the upper side and the lower side of the vertical panel; the rainwater hopper is detachably installed on the lower side of the lower inclined panel, the drainage pipe is installed in the rainwater hopper, and carrying, installation, use, storage and storage can be facilitated. 本实用新型涉及一种楼梯间层间止水装置，包括Z字型挡水板、雨水斗和排水管，所述Z字型挡水板包括上斜面板、立面板和下斜面板，所述上斜面板和下斜面板分别于所述立面板的上侧、下侧柔性连接；所述雨水斗可拆卸的安装于下斜面板的下侧，排水管安装于雨水斗内，能够便于搬运、安装使用和保存收纳。