Underground steel sheet pile hole reserving structure

The utility model provides an underground steel sheet pile hole reserving structure, and relates to the technical field of underground hole reserving, the underground steel sheet pile hole reserving structure comprises a connecting plate and a blocking plate, the connecting plate is provided with a reserved hole, the blocking plate is installed at the reserved hole, two sides of the connecting plate are provided with lock catch structures used for being connected with a steel sheet pile, and the lock catch structures are connected with the steel sheet pile. A plurality of limiting lugs are arranged in the circumferential direction of the plugging plate, a limiting groove used for containing the limiting lugs is formed in the connecting plate, a stopping plate is arranged at a groove opening of the limiting groove, the stopping plate shields part of the groove opening, a placing opening is reserved in the stopping plate, and a handle is arranged on the plugging plate. The lock catch structures on the two sides