Temporary cofferdam geotechnical bag sand filling dustproof device

The utility model discloses a temporary cofferdam geotextile bag sand filling and dust preventing device which comprises a customized geotextile pipe bag and a dust preventing bin arranged above the customized geotextile pipe bag, a sand filling opening is formed in the customized geotextile pipe bag, the dust preventing bin is arranged above the sand filling opening, and a first supporting leg and a second supporting leg are arranged on the two sides of the bottom of the dust preventing bin respectively. The first supporting leg and the second supporting leg are both of an L-shaped plate-shaped structure, a vertical plate of the first supporting leg and a vertical plate of the second supporting leg are arranged on the two sides of the customized geotextile tube bag respectively, the dustproof bin is of a box body structure and comprises a bottom plate, a side plate and a top cover, the dustproof bin is arranged on the customized geotextile tube bag in a crossing mode, and the side edge of one side of the bot