The utility model discloses a fill ability of swimming sealing wall in pit fast, include by a plurality of wall bodies that the water bag piles up formation each other that fill that fill water, sealing wall's wall body piles up formation by a plurality of water bags that fill each other after filling water, shortened the structure time of current explosion -proof fire dam greatly, has not only alleviateed workman's intensity of labour, has promoted the security, and the shutoff effect is more ideal, furthermore, the utility model discloses rational in infrastructure, the small investment, easy operation, only need with water fill go into to fill the long bag of water can, improved work efficiency, the cost is reduced, the process safety of can effectively guaranteeing to relieve disaster.