Height-adjustable keel assembly

The utility model discloses a height-adjustable keel assembly which comprises a guide rail, a clamping piece connecting piece is movably arranged on the guide rail, an installation through hole is formed in the guide rail, one side of the installation through hole is communicated with a strip-shaped positioning groove, the guide rail is installed on a cross-shaped screw head, a threaded rod is integrally connected to the lower portion of the cross-shaped screw head, and a clamping piece is arranged on the clamping piece connecting piece. An adjusting disc is integrally fixed to the threaded rod, four reserved holes are formed in the adjusting disc, and an implosion type expansion pipe is connected to the bottom end of the threaded rod in a threaded mode. The construction of the wallboard on the wall is not limited by whether the foundation wall surface is vertical or flat, compared with the prior art, the repair of the foundation wall surface is reduced, the construction standardization is improved, the const