The invention belongs to the technical field of buildings, and relates to a frame-type excavation system. The technical problem that the digging efficiency is low in the prior art is solved. The frame-type excavation system comprises an excavator, and a frame-type supporting mechanism is fixed on the ground. The frame-type supporting mechanism comprises a vertically-arranged supporting column mechanism and a horizontally-arranged supporting frame mechanism. The excavator is pressed on the supporting frame mechanism and can run along the supporting frame mechanism. According to the frame-type excavation system, the moving efficiency of the excavator can be greatly improved, the excavator can dig out soil under the ground without driving into the underground position, and therefore the digging efficiency is greatly improved and the safety of digging work is improved.