A sheet pile planarization apparatus is provided to shorten session and streamline task by flatting a sheet pile with transferring the sheet pile without reversing the sheet pile along a bent direction. A sheet pile planarization apparatus comprises: a supporting frame(10); three or more plane supporting members(16) being installed at the supporting frame and supporting the lower-part of the sheet pile(40); and a flattening member being movably installed at a jack cylinder(20) installed at the supporting frame and being equipped with two or more push plates(28) for pressing the upper side of the sheet pile. In the jack cylinder, a cylinder rod is movably installed inside and outside.
