Full-slewing drilling machine foundation for protecting underground structure

The utility model provides a full-slewing drilling machine foundation for protecting an underground structure, which comprises guide walls arranged on two sides of a secant pile to be constructed; the ground beam is arranged on one side, back to the guide wall, of the underground structure; the base plates are arranged above the underground structure at intervals, the two ends of the base plates are in lap joint with the guide wall and the ground beam respectively, and the upper end faces of the base plates serve as bearing faces for bearing the full-slewing drilling machine. The guide wall and the ground beam are arranged on the two sides of the underground structure respectively, the base plate crosses the underground structure and is erected on the guide wall and the ground beam on the two sides of the underground structure, the full-slewing drilling machine is arranged on the base plate, construction loads are transmitted to the guide wall and the ground beam through the base plate, the underground struct