Device for sealing and positioning bottom of concrete wall template

The utility model discloses a device for sealing and positioning the bottom of a concrete wall template. The outer side of a concrete wall is provided with a wall template; the wall template and a bottom concrete structure are sealed by virtue of a sealing strip; the width of the sealing strip is equal to that of the wall template, and the sealing strip is opposite to the wall template; a mortar levelling layer is arranged between the sealing strip and the bottom concrete structure, the inner side of the mortar levelling layer is flush with that of the wall template, and the outer side of the mortar levelling layer extends outwards so as to be provided with a platform surface; the platform surface is provided with a lateral-limit positioning plate strip clung to the wall template; the lateral-limit positioning plate strip is fixedly nailed at the bottom concrete structure by virtue of a group of steel nails. According to the device, the problems such as template displacement, deformation and slurry leakage which commonly exist in existing concrete wall construction are solved, common quality problems such as concrete 'root rot', flaw and pitted surfaces are avoided, and damages on structure steel bars cannot be caused, so that the engineering quality of the structure is ensured, rear-stage chiseling repair as well as wastes of manpower and materials and construction period losses brought by chiseling repair are avoided.