Prestress active support control process for underground excavation underground engineering

The invention discloses a prestress active support control process for underground excavation underground engineering, which belongs to the technical field of underground engineering excavation support and comprises the following steps: determining an excavation disturbance influence range of the underground excavation underground engineering; supporting beams are laid on the earth surface in the trend of the underground engineering to be excavated, and reserved holes are formed in the supporting beams; stratum drill holes are drilled in the range of the to-be-excavated section of the underground excavation underground engineering and in the boundary direction of the peripheral disturbance influence range along the reserved holes, and suspension supporting components penetrate through the reserved holes of the supporting beams and stretch into the bottoms of the stratum drill holes to be installed; the top end of the suspension supporting component is fixed above the supporting beam through a lock; undergroun