Construction joint structure of water-containing building bottom plate

The utility model relates to a construction joint structure of a water-containing building bottom plate, which comprises a concrete foundation, a construction joint is arranged on the concrete foundation along the plumb direction, sealant is arranged at the top of the construction joint, a steel-edged rubber waterstop is arranged in the middle of the construction joint, and an externally-attached waterstop is arranged at the bottom of the construction joint. And impermeable fillers embedded in the construction joints are arranged above and below the steel edge rubber waterstop. The construction joint structure of the water-containing building bottom plate is good in waterproofness and deformation resistance, and long-term use of a building can be guaranteed; under the condition that any one waterproof layer fails, other waterproof layers can still be normally used, and the reliability is high; compared with a traditional rubber water-stop belt, the middle steel edge rubber water-stop belt is fixed and firm in