Novel separated groove type reserved hole sleeve construction tool

The utility model discloses a novel separated groove type reserved hole casing pipe construction tool which comprises a folding casing pipe, a top cover and a casing pipe fixing device, the folding casing pipe is formed by splicing a plurality of pipe pieces in the circumferential direction, all the pipe pieces are connected in a hinged mode through hinge pieces, and the hinge pieces between two of the pipe pieces are of a detachable structure. The top cover is arranged at the top of the folding sleeve, the sleeve fixing device is used for fixing the folding sleeve to a top plate template, andthe folding sleeve is further sleeved with a circular ring; the tool disclosed by the utility model is applied to the construction of the reserved hole of the sleeve, and the separated sleeve is fastto mount, firm to mount and convenient to dismount, and can be used in a plurality of projects in a turnover manner, so that the dismounting and mounting work efficiency is improved, and the damage to the flatness of floor co