To provide a method for quickly work executing a flexible plate.

Since this work execution method for the flexible plate 1 comprises a process for laying reinforcing plates 2, 22 and 32 all over on a roadbed 5 of leveling the ground, a process for fixing the reinforcing plates 2, 22 and 32 and a process for fixing the flexible plate 1 to the reinforcing plates 2, 22 and 32, the flexible plate 1 can be immediately fixed after fixing the reinforcing plates 2, 22 and 32 to the roadbed 5 so that a construction period can be largely shortened.