TDF folding machine according to its manual control mode is divided into hydraulic folding machines and folding machines, manual folding machine with bevel gear locking structure; hydraulic folding machines chosen by pressing and bending cylinder control, is designed for TDF flange bending and the development of a special equipment, it has the advantages of light weight, convenient to move, very suitable for use in the construction site, it can be bent any size the duct of TDF flange.